All target shooters strive for perfect shot placement. Well one man has come closer to perfection than any other shooter who ever lived. You are looking at Michael Stinnett’s .0077″ NBRSA world-record group, the smallest 100-yard 5-shot group ever shot in the history of rifle competition. (We’re told the group was certified at .0077″ though labeled .008″ on this photo. A moving backer verified that this was FIVE shots.)
Call it stunning, call it humbling, call it amazing. It is, quite simply the apotheosis (“perfect example”) of accuracy. This is what we all hope to achieve. It’s staggering to see that a rifle can drill FIVE perfectly-overlapped holes — the last virtually indistinguishable from the first — at a target a football field (100 yards) away. Yes the stars aligned for Mike, but it’s great to see a benchmark like this, if only to remind us what is possible in our sport of precision shooting. (Sighters appear below record target.)
Below is a larger-than-life-size view. Using this photo we measured the group with target-calculating software, and it came out .006″ (the software only goes to three digits). We recognize that it would be much better to work from the real target rather than a photo, so we are not challenging the official measurement in the least. But this does confirm that this is a phenomenally small five-shot group.
Many folks have asked about the gun and ammo that produced the .0077″ group. The Light Varmint-class Benchrest rifle was chambered as a .30-caliber wildcat, the 30 Stewart, which is based on the 6.5 Grendel case necked up. Mike was using Hodgdon H4198 powder behind BIB 114gr, 10-ogive bullets. Notably, the record-setting ammo was pre-loaded before the match. Here is Mike’s tuner-equipped rifle. CLICK HERE for more information on the rifle and cartridge.
Best Group Ever Record Rifle Equipment Report
Action: Kelby Panda “Speedy Shorty” with solid bolt and PPC-diameter bolt face. Kelby was asked to build several actions which were identical with the intent to eliminate any variance in head space between the two new rifles. This helped me use a single set-up on sizing dies for both rifles and ammo is interchangeable. Both actions were sent to Thomas ‘Speedy’ Gonzalez to be blue-printed and have Jewell triggers installed.
Reamer: 30 STEWART (I just call it a 30 PPC as that is what everyone expects, but it is in fact a custom design and Ralph deserves about 99% of the credit).
Barrels: Krieger was selected for the barrels. After discussions with Randy Robinett of BIB Bullets, a 1:17″ twist was identified as the correct, safe solution. Ralph Stewart has cut all my chambers using a custom-designed reamer. [Our goal] was consistent headspace and Ralph has been able to keep my barrels within .0002 variance. The barrel tuner also comes from Ralph Stewart.
Stock: Larson (including action bedding)
Scope: Leupold 45X Competition in Kelby Single Screw Tall Rings
Brass: Lapua (Base case is 6.5 Grendel)
Bullets: Randy Robinett (BIB) 30 Cal. 114gr, 10 Ogive (secondary bullet; primary is 112gr BIB)
Powder: H4198 – Stout Load with 2980 FPS Velocity
Front Rest: Farley Coaxial
Bags: Micro Fiber
Flags: Graham Wind Flags (large)
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We reported two weeks ago that Texas shooter Mike Stinnett nailed a .0077″ group in competition — the smallest 5-shot group ever shot at 100 yards. This has now been officially recognized as a new NBRSA record, eclipsing the .009″ record group shot 40 years ago by Mac McMillan. Congrats to Mike for breaking the “unbreakable record”. As Glenn C. posted on Benchrest Central: “They said it couldn’t be done. Hats off to Mike for an awesome personal achievement in a Sport/Hobby where getting your name in the record books is a rarity.”
Stinnett Sets .0077″ Record with a .30-Caliber Modified Grendel Cartridge, Pre-Loaded
Many folks have asked about the gun and ammo that produced the .0077″ group. The rifle was chambered as a .30-caliber wildcat, the 30 Stewart, which is based on the 6.5 Grendel case necked up. Mike was using Hodgdon H4198 powder behind BIB 114gr, 10-ogive bullets. Notably, the record-setting ammo was pre-loaded before the match. Unfortunately, we don’t have a photo of the target yet — it is still in the hands of the official NBRSA certification committee. However, Mike has been kind enough to tell us about his rifle and his load.
Mike Stinnett .0077″ Record Group Equipment Report
Mike reports: “Several guys have asked so here is my equipment listing. The hardware build actually started in 2008 with the goal of building two identical Benchrest rifles which could be used for both group and score. The idea was to shoot 6PPC and a 30 Cal without a base rifle change.”
Action: Kelby Panda “Speedy Shorty” with solid bolt and PPC-diameter bolt face. Kelby was asked to build several actions which were identical with the intent to eliminate any variance in head space between the two new rifles. This helped me use a single set-up on sizing dies for both rifles and ammo is interchangeable. Both actions were sent to Thomas ‘Speedy’ Gonzalez to be blue-printed and have Jewell triggers installed.
Reamer: 30 STEWART (I just call it a 30 PPC as that is what everyone expects, but it is in fact a custom design and Ralph deserves about 99% of the credit).
Barrels: Krieger was selected for the barrels. After discussions with Randy Robinett of BIB Bullets, a 1:17″ twist was identified as the correct, safe solution. Ralph Stewart has cut all my chambers using a custom-designed reamer. [Our goal] was consistent headspace and Ralph has been able to keep my barrels within .0002 variance. The barrel tuner also comes from Ralph Stewart.
Stock: Larson (including action bedding)
Scope: Leupold 45X Competition in Kelby Single Screw Tall Rings
Brass: Lapua (Base case is 6.5 Grendel)
Bullets: Randy Robinett (BIB) 30 Cal. 114gr, 10 Ogive (secondary bullet; primary is 112gr BIB)
Powder: H4198 – Stout Load with 2980 FPS Velocity
Front Rest: Farley Coaxial
Bags: Micro Fiber
Flags: Graham Wind Flags (large)
About the Cartridge — 30 Stewart (Based on Lapua 6.5 Grendel Parent Brass)
Mike explains: “Our goal was to shoot H4198 as the optimal powder for stability. There were several versions of the reamer before we settled on the current configuration. I am optimized for the 10 Ogive BIB bullet, powder to the base of the bullet. I found in testing the small 30-cal case did not like compression at all. The bullet is seated only 0.12″ into the case with zero freebore.
Cases were initially created with the .220 Russian (like a PPC) but I later decided it was better to build from the 6.5 Grendel. I size the brass and bump the shoulder back until it will fit into the chamber, fill to shoulder with International Clays, cotton wad packed on top. I have a fire-forming barrel. (I would not recommend this Clays and cotton wad method in a good barrel.) After initial fire-forming, I then mandrel the neck up the rest of the way to .30 caliber, turn the necks and trim.
It takes at least 8 firings to fully form a case! If you fire only three loads I find the brass does not have a sharp shoulder or any pressure on the bolt so any die selection is incorrect. Brass continues to harden well past 25 firings. I have match brass with well over 500 rounds fired, and I have never blown a case or neck yet (using my forming method).
For loading I use a Hornady Custom Shop Sizing Die and a Ralph Stewart Custom Seating Die. For those who are curious, yes the small group was fired with pre-loaded rounds. I do this now and then with local matches or may load 50 in a batch for one match.”
Mike wanted to thank his smiths, Randy Robinett, and all the folks involved in running the matches: “A big THANKS — as these are the guys that make our matches possible and without question maintain the integrity of the targets and record system. I was very fortunate to have all the right people in the right places for this match and my record. As for measurement – I only saw the target for about 10 seconds up close and can say I’m very happy I did not have to measure that group! Thanks again to everyone!” — Mike Stinnett
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One of the most remarkable shooting records — and one that has stood for four decades — is the 0.009″ five-shot group credited to Mac McMillan. The NBRSA Light Varmint Record of .009″ for five shots (at 100 yards) was set on 9/23/1973, forty years ago. Experts have considered that record “untouchable”, “unassailable” — in other words “unbreakable.”
Well records are meant to be broken. It appears that Texan Mike Stinnett has broken the “unbreakable” .009″ NBRSA record. Mike shot a .0077″ five-shot group at 100 yards in a registered short-range benchrest match at Denton, Texas. This will be a new NBRSA record (and all-time world record) if approved. Mike was shooting a .30-caliber cartridge, listed as a 30 PPC, but there’s some talk that the cases were formed from a Lapua 6.5 Grendel case. No matter — this is a mind-blowing accomplishment, particularly considering that Stinnett was shooting a .30-caliber gun, which has considerably more recoil than a 22 PPC or 6 PPC.
Forum member Wes J. (aka “P1ZombieKiller”) reports: “My buddy Mike Stinnett was just confirmed as having beat the world record LV group at 100 yards in a registered match. His group measured .0077″ and he did it with his 30 caliber.”
Wes adds: “Mike shoots thousands of rounds a year… I have sat on the bench right next to him several times, and he has rattled off five shots down range in a matter of 2-3 seconds, and the groups have measured in the .1s. The guy can flat shoot. His wind reading abilities are mind-blowing. When he gets the right condition, he is fast. REALLY FAST.”
NOTE: We will publish photos of Mike Stinnett and his target as soon as they are available.
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Mirage shields are useful for all shooters, not just hard-core competitors. A mirage shield helps you see your target better, without distortion caused by heat waves coming off your barrel. This isn’t rocket science — it’s a simple, inexpensive way to see better and shooter more accurately. We’ve advocated that varmint shooters give mirage bands a try on those hot summer groundhog and prairie dog expeditions. And we observed that practically every shooter at the 2013 World F-Class Championship was using a mirage shield of some kind.
Forum member Fabian from Germany, whose Sako 6mmBR Rifle was featured many years ago as a Gun of the Week, has devised a clever and inexpensive mirage band option. Fabian is a radiologist by trade. He notes that many X-ray machines require a daily test film for calibration. These are normally just discarded in the trash, so you can get them for free.
Fabian explains: “I’m a radiologist, so I handle medical x-ray films every day. Modern X-ray machines use laser-based printers and they need to print a test-film every day. One x-ray film is about 43×35 cm (16.9″ x 13.7″). Made from polyester, the films are very stable and only 0.007″ inches thick. They are light-weight, semi-transparent, and very stable. Using normal scissors, you can easily cut four mirage shields from a single sheet of film. Then glue on some velcro to attach to your barrel. Try it, you will not be disappointed.”
Carbon Fiber Mirage Shield from Rodzilla
If you’re not into making your own mirage shield, aka “mirage band”, Rodzilla, makers of the superb Raptor front rest and 5-Axis rest tops, offers an excellent 3″ x 24″ carbon fiber mirage shield. This 1/32″-thick band is really a top-tier, state-of-the-art shield. Order it for $30.00 from TheRodzilla.com web store.
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The U.S. Army Marksmanship Unit published a series of reloading “how-to” articles on the USAMU Facebook page. A while back the USAMU’s reloading gurus looked at the subject of cartridge run-out and what can be done to produce straighter ammo. Tasked with producing thousands of rounds of ammo for team members, the USAMU’s reloading staff has developed smart methods for improving concentricity, even with budget-priced dies. For other hand-loading tips, visit the USAMU Facebook page.
Minimizing Runout with Standard Seating Dies
This USAMU article explains how to set up standard bullet seating dies dies to minimize Total Indicated Run-out (TIR). The loading process is described using a single-stage press since most handloaders have one. A high-quality run-out gauge is essential for obtaining consistent, accurate results.
Having sized, primed, and charged our brass, the next step is bullet seating. Many approaches are possible; one that works well follows. When setting up a standard seating die, insert a sized, trimmed case into the shellholder and fully raise the press ram. Next, back the seating stem out and screw the die down until the internal crimping shoulder touches the case mouth.
Back the die out ¼ turn from this setting to prevent cartridge crimping. Next, lower the press ram and remove the case. Place a piece of flat steel (or window glass, which is quite flat) on the shellholder and carefully raise the ram.
Place tension on the die bottom with the flat steel on the shellholder. This helps center the die in the press threads. Check this by gently moving the die until it is well-centered. Keeping light tension on the die via the press ram, secure the die lock ring. If one were using a match style, micrometer-type seating die, the next step would be simple: run a charged case with bullet on top into the die and screw the seating stem down to obtain correct cartridge OAL.
However, with standard dies, an additional step can be helpful. When the die has a loosely-threaded seating stem, set the correct seating depth but don’t tighten the stem’s lock nut. Leave a loaded cartridge fully raised into the die to center the seating stem in the die. Then, secure the stem’s lock nut. Next, load sample cartridges and check them to verify good concentricity.
One can also experiment with variations such as letting the seating stem float slightly in the die to self-center, while keeping correct OAL. The run-out gauge will show any effects of changes upon concentricity. However, this method has produced excellent, practical results as evidenced by the experiment cited previously. These results (TIR Study 2) will reproduced below for the reader’s convenience.
First, however, let’s examine run-out figures of some factory-loaded match ammunition. This should give readers who are new to TIR gauges some perspective about the TIR ranges one might encounter.
TIR Study 1: 50 rounds Lake City M852 Match 7.62mm
(168 gr. Sierra MatchKings)
0.000” – 0.001” = 2%
0.001” – 0.002” = 30%
0.002” – 0.003” = 16%
0.003” – 0.004” = 22%
0.004” – 0.005” = 14%
0.005” – 0.006” = 14%
0.006” – 0.007” = 0%
0.007” – 0.008” = 2%
TIR Study 2: 50 rounds of .308 match ammo loaded using carefully-adjusted standard dies, vs. 50 using expensive “Match” dies from the same maker.
Standard dies, TIR:
0.000” — 0.001” = 52%;
0.001”– 0.002” = 40%;
0.002”– 0.003” = 8%.
None greater than 0.003”.
Note: both samples were loaded using the O-Ring method, i.e. with a rubber O-Ring placed under the locking ring of the Full-length sizing die to allow that die to float.
These tips are intended to help shooters obtain the best results from inexpensive, standard loading dies. Especially when using cases previously fired in a concentric chamber, as was done above, top-quality match dies and brass can easily yield ammo with virtually *no* runout, given careful handloading.
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.009″ — The Record That Stood for 40 Years.
In 1973 Mac McMillan shot an amazing 100-yard, .009″ five-shot group in a benchrest match. The .009″ group was measured with a 60x microscope for verification. Mac McMillan shot the group using a handbuilt prototype McMillan rifle with an early McMillan stock.
Mac’s .009″ group was the “Holy Grail” of rifle accuracy. This .009″ record was considered by many to be unbreakable, a record that would “stand for all time”. Well, it took 40 years, but someone finally broke Mac’s record with an even smaller group. In 2013, Mike Stinnett shot a .0077″ five-shot group using a 30 Stewart, a .30 caliber wildcat based on the 6.5 Grendel. Stinnett’s .0077″ group now stands as the smallest 100-yard group ever shot in registered benchrest competition.* Read About .0077″ group HERE.
Stinnett’s success doesn’t diminish the significance of Mac McMillan’s .009″ group in the history of benchrest competition. For four decades Mac’s group stood as the ultimate standard of rifle accuracy*. For those of you who have never seen Mac McMillan’s .009″ group, here it is, along with the NBRSA World Record certificate. The target now hangs in the McMillan Family Museum.
*Somebody else might claim a smaller group, but unless moving backers or electronic targets were used, it cannot be verified. Moving target backers are used at registered benchrest matches to ensure that five (5) shots are actually fired in each group. That eliminates any doubt.
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When your cases become hard to extract, or you feel a stiff bolt lift when removing a cartridge, it’s probably time to full-length size your cases, and “bump” the shoulder back. We generally recommend bumping shoulders each time you reload, after the initial fire-forming. Benchrest and F-Class benchrest shooters, running relatively high pressures, typically full-length size every load cycle, bumping the shoulder .001-.003″. High Power shooters with gas guns generally full-length size every time, and may need to bump the shoulders .003″ or more to ensure reliable feeding and extraction.
Use Shims for Precise Control of Shoulder Bump
Some shooters like to set the “default” position for their full-length die to have an “ample” .003″ or .004″ shoulder bump. When they need less bump, a simple way to reduce the amount of shoulder movement is to use precision shims in .001″ (one-thousandth) increments.
Here are reports from Forum members who use the shims:
“Great product. I have my die lock ring(s) adjusted for the shortest headspace length on my multiple chambers 6BRs and 6PPCs. When needing a longer headspace, I just refer to my notes and add the appropriate shim under the lock ring. Keep it simple.” — F.D. Shuster
Mats Johansson writes: “I’ve been using [shims] since Skip Otto (of BR fame) came out with them. I set up my dies with the .006″ shim, giving me the option of bumping the shoulder a bit more when the brass gets old and hardens while still having room to adjust up for zero headspace, should I have missed the original setup by a thou or two. Hunting rounds can easily be bumped an extra .002-.003″ for positive, no-crush feeding. Being a safety-oriented cheapskate, I couldn’t live without them — they let me reload my cases a gazillion times without dangerous web-stretching. Shims are a must-have, as simple as that.” — Mats Johansson
Sinclair Die Shim Kit — Seven Shims for $14.99
Sinclair Int’l (through Brownells) offers a seven-piece set of Sizing Die Shims that let you adjust the height of your die (and thereby the amount of bump and sizing) in precise .001″ increments. Sinclair explains: “Some handloaders will set their die up to achieve maximum sizing and then progressively use Sinclair Die Shims between the lock ring and the press head to move the die away from the shellholder. Doing this allows you to leave the lock ring in the same position. These shims are available in increments of .001″ and work very well.”
Seven Shims from .003″ to .010″
Sinclair’s $14.99 Die Shim Kit (item 22400) includes seven shims in thicknesses of .003, .004, .005, .006, .007, .008, and .010. For ease of use, shim thickness is indicated by the number of notches cut in the outer edge of each shim. Even without looking you can “count” the notches by feel.
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Mirage shields are useful for all shooters, not just hard-core competitors. A mirage shield helps you see your target better, without distortion caused by heat waves coming off your barrel. This isn’t rocket science — it’s a simple, inexpensive way to see better and shooter more accurately. We’ve advocated that varmint shooters give mirage bands a try on those hot summer groundhog and prairie dog expeditions. And we observed that practically every shooter at the 2013 World F-Class Championship was using a mirage shield of some kind.
Forum member Fabian from Germany, whose Sako 6mmBR Rifle was featured many years ago as a Gun of the Week, has devised a clever and inexpensive mirage band option. Fabian is a radiologist by trade. He notes that many X-ray machines require a daily test film for calibration. These are normally just discarded in the trash, so you can get them for free.
Fabian explains: “I’m a radiologist, so I handle medical x-ray films every day. Modern X-ray machines use laser-based printers and they need to print a test-film every day. One x-ray film is about 43×35 cm (16.9″ x 13.7″). Made from polyester, the films are very stable and only 0.007″ inches thick. They are light-weight, semi-transparent, and very stable. Using normal scissors, you can easily cut four mirage shields from a single sheet of film. Then glue on some velcro to attach to your barrel. Try it, you will not be disappointed.”
Carbon Fiber Mirage Shield from Rodzilla
If you’re not into making your own mirage shield, aka “mirage band”, Rodzilla, makers of the superb Raptor front rest and 5-Axis rest tops, offers an excellent 3″ x 24″ carbon fiber mirage shield. This 1/32″-thick band is really a top-tier, state-of-the-art shield. Order it for $30.00 from TheRodzilla.com web store.
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When your cases become hard to extract, or you feel a stiff bolt lift when removing a cartridge, it’s probably time to full-length size your cases, and “bump” the shoulder back. Short-range benchrest shooters, running high pressures, typically full-length size every load cycle, bumping the shoulder .001-.002″. The vast majority of mid-range and long-range F-Class shooters also full-length size every time. High Power shooters with gas guns should definitely full-length size every time, and may need to bump the shoulders .003″ or more to ensure reliable feeding and extraction.
Use Shims for Precise Control of Shoulder Bump
Some shooters like to set the “default” position for their full-length die to have an “ample” .003″ or .004″ shoulder bump. When they need less bump, a simple way to reduce the amount of shoulder movement is to use precision shims in .001″ (one-thousandth) increments. Sinclair Int’l offers a set of seven (7) shims for your standard 7/8-14 FL sizing dies for $14.99.
Sinclair explains: “Each shim is notched for easy size identification. Just set your die using one of the middle thickness shims. Adjustments can be made easily by changing shims to increase or decrease die depth without changing the stem setting. This is a great upgrade for non-micrometer adjustable dies.”
Here are reports from Forum members who use the shims:
“Great product. I have my die lock ring(s) adjusted for the shortest headspace length on my multiple chambers 6BRs and 6PPCs. When needing a longer headspace, I just refer to my notes and add the appropriate shim under the lock ring. Keep it simple.” — F.D. Shuster
Mats Johansson writes: “I’ve been using [shims] since Skip Otto (of BR fame) came out with them. I set up my dies with the .006″ shim, giving me the option of bumping the shoulder a bit more when the brass gets old and hardens while still having room to adjust up for zero headspace, should I have missed the original setup by a thou or two. Hunting rounds can easily be bumped an extra .002-.003″ for positive, no-crush feeding. Being a safety-oriented cheapskate, I couldn’t live without them — they let me reload my cases a gazillion times without dangerous web-stretching. Shims are a must-have, as simple as that.” — Mats Johansson
Brownells offers the seven-piece set of Sizing Die Shims that let you adjust the height of your die (and thereby the amount of bump and sizing) in precise .001″ increments. Sinclair explains: “Some handloaders will set their die up to achieve maximum sizing and then progressively use Sinclair Die Shims between the lock ring and the press head to move the die away from the shellholder. Doing this allows you to leave the lock ring in the same position. These shims are usually available in increments of .001″ and work very well.”
Seven Shims from .003″ to .010″
For use with 7/8-14 threaded dies, Sinclair’s $14.99 Die Shim Kit (Sinclair item 22400 or Brownells Code 749-001-325WB) includes seven shims in thicknesses of .003, .004, .005, .006, .007, .008, and .010. For ease of use, shim thickness is indicated by the number of notches cut in the outer edge of each shim. Even without looking you can “count” the notches by feel.
NOTE: These shim sets can also be use to adjust bullet seating depth for dies that lack micrometer adjustment. Use the same 7/8-14 shims with your non-micrometer seating dies.
Shims for Arbor Dies
Do you seat with an Arbor Press? No problem…
Brownells offers a $14.99 10-shim Arbor Die set for use with L.E. Wilson seating dies employed with arbor presses. Frankly we prefer micrometer-top Wilson dies, but if you have the standard Arbor dies, these shims come in handy. Order either Brownells Code 749-001-370WB (.22 to .243 caliber) or Brownells Code 749-001-326WB (.25 to .30 caliber).
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Look and be amazed! In competition, a rifle drilled FIVE perfectly-overlapped bullet holes — the last virtually indistinguishable from the first — at a target a football field (100 yards) away.
Today we feature a benchrest rifle that earned its place in history by setting a small-group record in 2013 that may never be broken. This .30-caliber benchrest rig shot a 0.0077″ five-shot group at 100 yards. That’s the smallest 100-yard group ever shot in competition by ANY gun at 100 yards in history. And we may never see anything smaller in our lifetimes.
In setting that .0077″ (seventy-seven ten-thousandths of an inch) record, the shooter, Mike Stinnett, broke a record that stood for four decades — the 0.009″ five-shot group credited to Mac McMillan. The previous NBRSA Light Varmint Record of .009″ for five shots (at 100 yards) was set on 9/23/1973, 49 years ago. Experts considered that record “untouchable”, “unassailable” — in other words “unbreakable.” But Mike broke Mac’s record 40 years after it was set.
The Record-Setting Rifle and Cartridge
The gun that produced the historic .0077″ group was a Light Varmint-class Benchrest rifle chambered as a .30-caliber wildcat, the 30 Stewart. That cartridge is based on the 6.5 Grendel case necked up. The load had Hodgdon H4198 powder behind BIB 114gr, 10-ogive bullets. Notably, the record-setting ammo was pre-loaded before the match.
The Smallest 100-yard Group in History
All target shooters strive for perfect shot placement. Well one man has come closer to perfection than any other shooter who ever lived. You are looking at Michael Stinnett’s .0077″ NBRSA world-record group, the smallest 100-yard 5-shot group ever shot in the history of rifle competition. The group was certified at .0077″ (though labeled .008″ on the range-signed target below). A moving backer verified that this was FIVE shots — no question about that. You may be surprised but this was NOT shot by a 6 PPC, but rather a .30-caliber wildcat, based on the 6.5 Grendel.
Group Is Smaller than ANY 100-yard Group Shot in ANY Class
Mike’s amazing group stands as a NBRSA Light Varmint Class record. But it is also smaller than the current NBRSA 5-shot, 100-yard records for ALL other classes, even Unlimited (Rail Gun). Likewise Stinnett’s .0077″ group is smaller than the IBS records for ALL classes:
Better than any Rail Gun too — Mike Stinnett’s .0077″ group was smaller that ANY group shot in ANY class — event Unlimited Rail Guns, as shown below:
Below is a larger-than-life-size view. Using this photo we measured the group with target-calculating software, and it came out .006″ (the software only goes to three digits). We recognize that it would be much better to work from the real target rather than a photo, so we are not challenging the official measurement in the least. But this does confirm that this is a phenomenally small five-shot group.
Stinnett Sets .0077″ Record with a .30-Caliber Modified Grendel Cartridge, Pre-Loaded
Many folks have asked about the gun and ammo that produced the .0077″ group. The rifle was chambered as a .30-caliber wildcat, the 30 Stewart, which is based on the 6.5 Grendel case necked up. Mike was using Hodgdon H4198 powder behind BIB 114gr, 10-ogive bullets. Notably, the record-setting ammo was pre-loaded before the match. Unfortunately, we don’t have a photo of the target yet — it is still in the hands of the official NBRSA certification committee. However, Mike has been kind enough to tell us about his rifle and his load.
Mike Stinnett .0077″ Record Group Equipment Report
Mike reports: “Several guys have asked so here is my equipment listing. The hardware build actually started in 2008 with the goal of building two identical Benchrest rifles which could be used for both group and score. The idea was to shoot 6PPC and a .30 Cal without a base rifle change.”
Record-Setting Rifle Equipment and Components
Action: Kelbly Panda “Speedy Shorty” with solid bolt and PPC-diameter bolt face. Kelbly was asked to build several actions which were identical with the intent to eliminate any variance in head space between the two new rifles. This helped me use a single set-up on sizing dies for both rifles and ammo is interchangeable. Both actions were sent to Thomas ‘Speedy’ Gonzalez to be blue-printed and have Jewell triggers installed.
Reamer: 30 STEWART (I just call it a 30 PPC as that is what everyone expects, but it is in fact a custom design and Ralph deserves about 99% of the credit).
Barrels: Krieger was selected for the barrels. After discussions with Randy Robinett of BIB Bullets, a 1:17″ twist was identified as the correct, safe solution. Ralph Stewart has cut all my chambers using a custom-designed reamer. [Our goal] was consistent headspace and Ralph has been able to keep my barrels within .0002 variance. The barrel tuner also comes from Ralph Stewart.
Stock: Larson (including action bedding)
Scope: Leupold 45X Competition in Kelby Single Screw Tall Rings
Brass: Lapua (Base case is 6.5 Grendel)
Bullets: Randy Robinett (BIB) 30 Cal. 114gr, 10 Ogive (secondary bullet; primary is 112gr BIB)
Powder: H4198 – Stout Load with 2980 FPS Velocity
Front Rest: Farley Coaxial
Bags: Micro Fiber
Flags: Graham Wind Flags (large)
About the Cartridge — 30 Stewart (Based on Lapua 6.5 Grendel Parent Brass)
Mike explains: “Our goal was to shoot H4198 as the optimal powder for stability. There were several versions of the reamer before we settled on the current configuration. I am optimized for the 10 Ogive BIB bullet, powder to the base of the bullet. I found in testing the small 30-cal case did not like compression at all. The bullet is seated only 0.12″ into the case with zero freebore.
Cases were initially created with the .220 Russian (like a PPC) but I later decided it was better to build from the 6.5 Grendel. I size the brass and bump the shoulder back until it will fit into the chamber, fill to shoulder with International Clays, cotton wad packed on top. I have a fire-forming barrel. (I would not recommend this Clays and cotton wad method in a good barrel.) After initial fire-forming, I then mandrel the neck up the rest of the way to .30 caliber, turn the necks and trim.
It takes at least 8 firings to fully form a case! If you fire only three loads I find the brass does not have a sharp shoulder or any pressure on the bolt so any die selection is incorrect. Brass continues to harden well past 25 firings. I have match brass with well over 500 rounds fired, and I have never blown a case or neck yet (using my forming method).
For loading I use a Hornady Custom Shop Sizing Die and a Ralph Stewart Custom Seating Die. For those who are curious, yes the small group was fired with pre-loaded rounds. I do this now and then with local matches or may load 50 in a batch for one match.”
Mike wanted to thank his smiths, Randy Robinett, and all the folks involved in running the matches: “A big THANKS — as these are the guys that make our matches possible and without question maintain the integrity of the targets and record system. I was very fortunate to have all the right people in the right places for this match and my record. As for measurement – I only saw the target for about 10 seconds up close and can say I’m very happy I did not have to measure that group! Thanks again to everyone!” — Mike Stinnett
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Scope Evaluation with Test in Benchrest Competition by James Mock
Since I started shooting in competition in the early ’90s, rifle scopes have really improved. The one which I am now testing may be the high point (zenith) of scope quality. The IOR Valdada Terminator 12-52x56mm with 40mm tube is a great scope by any standard. There are only two negative aspects to using one of these instruments. One is cost (retail $3695) and the other is weight (three pounds).
Many say that this scope is without equal. However, the most common complaints among those willing to pay the cost for this exceptional instrument was that there was no zero stop and the 1/4-MOA adjustments were too coarse. The folks at IOR Valdada listened and corrected both problems. They added a very functional zero stop and changed the adjustments to 1/8th MOA. Valdada listens to its customers.
“The Valdada performed absolutely perfectly and enabled me to win the match. The 1/8th MOA clicks are crisp and accurate and the big 40mm tube allows 100 minutes of vertical adjustment. The tracking of the scope was perfect. The MOA reticle and the precise 1/8th minute clicks helped tremendously. The scope performed flawlessly. Even with my 77 year-old eyes, I could see 6mm bullet holes in the white at 600 yards with this scope. I have been able to do that only one other time.”– James Mock
Some of the great qualities of the new Terminator scope are:
— Lenses are made with the finest glass from the Germany’s famous Schott Glasswerks (lenses have the proprietary Z-7 coating with 7-11 coats for EACH lens surface).
— Parallax adjustment on the tube body allows convenient and very precise adjustments.
— Reticle with precise hashmarks and illuminated center dot.
— One hundred MOA of vertical adjustment range.
This scope is very well thought out in all respects. The parallax adjustment is on the tube just behind the objective bell. It is very easy to get a sharp, parallax-free image with it.
As can be seen in the picture, this scope has every feature that long range shooters desire. With the change from 1/4-MOA to 1/8-MOA adjustments, one can see that this company listens to its customers. This is a second focal plane (SFP) scope and Valdada has a 40mm tube scope with first focal plane (FFP) for those who prefer that option. NOTE: The max magnification for the FFP version is 40X rather than 52X.
The power-changing ring of this scope is also well thought out. It features three different color-coded “clicks” that indicate subtension of the hash marks. (Meaning you have positive confirmation of the hash mark value). At 14.4X the reticle hash marks subtend 1/2 MIL. At 26X they represent one MOA and at 52X the hash marks represent 1/2-MOA (very handy for wind calls).
IOR Valdada 12-52x56mm Scope Proves Itself in Competition This Month
I received the scope on October 15th and used it in a 600-yard match on Saturday, October 16th. I quit competition several months ago and sold my trusty BAT/Leonard rifle. However, I could not stay quit and I picked up a Stiller Cobra action, and Dusty Stevens chambered a Krieger 1:7.5″-twist barrel in 6mm Dasher for this rifle. I received the barrel on October 13th, and that gave me three days to break in the barrel, find a load and get the scope zeroed. I shot 15 rounds of 1 shot/clean, 1 shot clean, 1-shot clean, 3-shots clean until I had 15 rounds. Since I did not have the scope, I could not develop a match load.
After receiving the Terminator on Friday, October 15th. I finished the fire-forming of the 48 pieces of brass and zeroed the scope with the fire-forming load. The scope was not hard to zero and I was very impressed with the optics. I wasn’t surprised at the quality — since 2009, I have shot a Valdada 36X Benchrest model on my target rifle. That is a superb scope with rock-solid adjustments and great Schott glass.
Shooting the “Square” Confirms Great Tracking
I shot the “square” with some fireform loads and the last bullet went through the hole made by the initial round. For those not familiar with this test, it consists of 5 shots while using the same aim point and adjusting 6 MOA between each shot. So the second shot is 6 MOA above the first, the third is 6 MOA right, the fourth is 6 MOA down and the fifth, final shot is 6 MOA left. When the last shot goes through the hole of the first, one can conclude that the scope adjustments are spot on. This Terminator was perfect.
Because of time restraints, I did not have a chance to work up a good load for this barrel, so I resorted to a load that had worked with a previous Dasher. It was with 32.5 grains of Varget and a 105gr Berger Hybrid seated .007″ into the lands. I favor Bart’s Hammers, but did not have enough to shoot the match.
Although I had only one day with the scope before the match, I got it mounted on the rifle. I shot ONE shot at my 100-yard range and adjusted the scope up 11 MOA. I told some of the shooters that I had never been so ill-prepared for a match. However, the Valdada performed absolutely perfectly and enabled me to win the match (first win at 600 in a long time!). The MOA reticle and the precise 1/8th-minute clicks helped tremendously.
The 1/8-MOA clicks are crisp and accurate and the big 40mm tube allows 100 minutes of vertical adjustment. The tracking of the scope was perfect. Valdada uses steel ball bearings in this scope.
During the match, the hash marks are very useful. Since the hash marks subtend 1/2-MOA at 52X, I used the scope at that power until the 4th target and then used it at 26X so I could use the 1-MOA hash marks. Since we shoot a steel gong for sighters, it is easy to determine the amount of winddrift by using these hash marks.
This scope features a lighted reticle. This is not an important feature for the type of shooting that I do, but many make use of this feature. The scope also features a zero stop that is very handy for those shooting events in which several adjustments are used. If one gets “lost” he can simply dial back to the “set zero”. This system was very easy to use.
Bullet-maker and benchrest shooter Bart Sauter has been using an IOR Valdada Terminator scope for several years and has made an impact in the 600-yard game. He is a Valdada dealer. If you need a Terminator or other IOR Valdada optic, give Bart a call.
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All target shooters strive for perfect shot placement. Well one man has come closer to perfection than any other shooter who ever lived. You are looking at Michael Stinnett’s .0077″ NBRSA world-record group, the smallest 100-yard 5-shot group ever shot in the history of rifle competition. The group was certified at .0077″ (though labeled .008″ on the range-signed target below). A moving backer verified that this was FIVE shots — no question about that. You may be surprised but this was NOT shot by a 6 PPC, but rather a .30-caliber wildcat, based on the 6.5 Grendel.
Call it stunning, call it humbling, call it amazing. It is, quite simply the apotheosis (“perfect example”) of accuracy. This is what we all hope to achieve. It’s staggering to see that a rifle can drill FIVE perfectly-overlapped holes — the last virtually indistinguishable from the first — at a target a football field (100 yards) away. It’s great to see a benchmark like this, if only to remind us what is possible in our sport of precision shooting. (Sighters appear below record target.)
Mike’s amazing group stands as a NBRSA Light Varmint Class record. But it is also smaller than the current 5-shot, 100-yard records for all other classes, even Unlimited (Rail Gun). Likewise Stinnett’s .0077″ group is smaller than the IBS records for all classes:
Below is a larger-than-life-size view. Using this photo we measured the group with target-calculating software, and it came out .006″ (the software only goes to three digits). We recognize that it would be much better to work from the real target rather than a photo, so we are not challenging the official measurement in the least. But this does confirm that this is a phenomenally small five-shot group.
The Record-Setting Rifle and Cartridge
Many folks have asked about the gun and ammo that produced the .0077″ group. The Light Varmint-class Benchrest rifle was chambered as a .30-caliber wildcat, the 30 Stewart, which is based on the 6.5 Grendel case necked up. Mike was using Hodgdon H4198 powder behind BIB 114gr, 10-ogive bullets. Notably, the record-setting ammo was pre-loaded before the match. Here is Mike’s tuner-equipped rifle. CLICK HERE for more information on the rifle and cartridge.
Record Rifle Equipment Report by Mike Stinnett
Action: Kelbly Panda “Speedy Shorty” with solid bolt and PPC-diameter bolt face. Kelbly was asked to build several actions which were identical with the intent to eliminate any variance in head space between the two new rifles. This helped me use a single set-up on sizing dies for both rifles and ammo is interchangeable. Both actions were sent to Thomas ‘Speedy’ Gonzalez to be blue-printed and have Jewell triggers installed.
Reamer: 30 STEWART (I just call it a 30 PPC as that is what everyone expects, but it is in fact a custom design and Ralph deserves about 99% of the credit).
Barrels: Krieger was selected for the barrels. After discussions with Randy Robinett of BIB Bullets, a 1:17″ twist was identified as the correct, safe solution. Ralph Stewart has cut all my chambers using a custom-designed reamer. [Our goal] was consistent headspace and Ralph has been able to keep my barrels within .0002 variance. The barrel tuner also comes from Ralph Stewart.
Stock: Larson (including action bedding)
Scope: Leupold 45X Competition in Kelby Single Screw Tall Rings
Brass: Lapua (Base case is 6.5 Grendel)
Bullets: Randy Robinett (BIB) 30 Cal. 114gr, 10 Ogive (secondary bullet; primary is 112gr BIB)
Powder: H4198 – Stout Load with 2980 FPS Velocity
Front Rest: Farley Coaxial
Bags: Micro Fiber
Flags: Graham Wind Flags (large)
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One of the most remarkable shooting records — and one that has stood for four decades — is the 0.009″ five-shot group credited to Mac McMillan. The NBRSA Light Varmint Record of .009″ for five shots (at 100 yards) was set on 9/23/1973, forty years ago. Experts have considered that record “untouchable”, “unassailable” — in other words “unbreakable.”
.009″ — The Record That Stood for 40 Years.
Shims for Arbor Dies
During the match, the hash marks are very useful. Since the hash marks subtend 1/2-MOA at 52X, I used the scope at that power until the 4th target and then used it at 26X so I could use the 1-MOA hash marks. Since we shoot a steel gong for sighters, it is easy to determine the amount of winddrift by using these hash marks.
