Here’s an important announcement for anyone who uses a powder in the 4350 range. Alliant is now shipping the all-new Reloder 16 powder. The burn rate is slightly faster than Reloder 17, and a bit slower than Varget or Reloder 15. Notably, this new Reloder 16 powder is very temp stable. AccurateShooter.com was shown “top secret” test results comparing Reloder 16 with other popular propellants, including Hodgdon Extreme series powders. The results for Reloder 16 were remarkable. Reloder 16 showed extremely constant velocities even with very high ambient temps — so this is a powder you can shoot even on hot Arizona summer days.
This is NOT just a slower version of Alliant’s double-based Reloder 15 (which words great in the 6mmBR and Dasher cartridges). Reloder 16 is a completely new formulation, produced in Sweden by Bofors for Alliant. Reloder 16 utilizes TZ technology, which manipulates the response of the propellant and resists the natural tendency to generate more pressure at higher temperatures and less pressure at lower temperatures.
As a result, Reloder 16 offers outstanding temperature stability. Based on the test results we’ve seen, if you are using H4350 or IMR 4451 currently, you should definitely give Reloder 16 a try. The powder also boasts excellent lot-to-lot consistency and contains a proprietary de-coppering additive.
Match and Hunting Cartridge Applications:
Alliant tells us that Reloader 16 “is ideal for traditional hunting cartridges, such as .30-06 Springfield and .270 Winchester, as well as 6.5mm target loads and tactical applications wherein temperature stability is required.” We also think the powder may work very well in these popular match cartridges: 6XC, .243 Win, 6.5×47 Lapua, 6.5 Creedmoor, .260 Rem, .284 Win, and .300 WSM. For example, Alliant’s Load Data Sheet shows a 2772 FPS load with 142gr SMKs in the .260 Rem.
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PrecisionRifleBlog.com (PRB) recently published results from a field test PRB conducted to quantify the temperature stability of the popular Hodgdon H4350 and Varget powders and compare those to IMR’s new Enduron line of powders, specifically IMR 4166 and 4451.
Hodgdon Extreme Series powders have attracted quite a fan base, with over 90% of the top shooters in the Precision Rifle Series choosing to run one of those powders. IMR recently released a new line of powders “with Enduron Technology” — which is also marketed to have “extreme temperature stability”. Sounds familiar! These new powders should compete directly with the Hodgdon Extreme Series, which gives shooters more temp-stable powder options to consider.
The top shooters in the PRS and veteran long-range shooters in other disciplines have learned to value a temperature-stable powder. That’s because a change in temperature can affect the trajectory or “flight path” of the bullet in two well-known ways:
1. Assuming all other environmental conditions remain the same, an increase in air temperature will cause a flatter trajectory due to a lower air density (easier for the bullet to cut through the air).
2. The same increase in temperature also causes the nitrocellulose-based powder inside the cartridge to burn at a higher rate, producing approximately four times the Point of Impact (POI) shift than just air temperature alone. (SEE: Temperature Effects On Zero on KestrelMeters.com.)
“The initial heat condition of your powder will affect the burn rate,” Bryan Litz explained at a recent Applied Ballistics Seminar. That means swings in ambient outside temperature can affect your internal ballistics, which will directly affect your muzzle velocity, which will change your bullet’s trajectory. Some powders are more affected by changes in temperature than others. So if your goal is first-shot hits and you may shoot in a variety of conditions — you should care about temperature stable powders.
The folks at PrecisionRifleBlog.com meticulously loaded 6.5×47 Lapua ammo with each powder using some of the best equipment available. This included the top-of-the-line Prometheus Gen II Powder Scale, which is capable of loading to the nearest kernel of powder. This ensured the powder charges were identical for each round of ammo. PRB’s testers explain the full set of equipment and steps in their loading process in the Full Test Report.
Once they had a couple dozen rounds loaded with each powder, they went and shot them with each powder at 25° F, 65° F, and 140° F. The muzzle velocity of each shot was recorded using both a LabRadar Doppler Radar and a MagnetoSpeed Chronograph. The LabRadar is a new type of device that allows you to measure muzzle velocity within at least +/- 0.1% of the reading.
Here are the results from the PRB Powder Temp Stability Tests:
You can see Hodgdon H4350 had the least variance in muzzle velocity, with just 25 fps over the 115° swing in temperature! That is very, very low. Hodgdon Varget was the second least temperature sensitive powder in this test, with 46 fps of variance in muzzle velocity between temperatures of 25° F and 140° F. IMR 4166 performed very similar to Varget, and proved to be fairly insensitive to large swings in temperature. IMR 4451 had the largest swing in muzzle velocity of the powders tested, but keep in mind just 68 fps over 115° F swing is still a good performance.
Most powders aren’t specially formulated to be temperature stable. So they would likely show much larger swings than what these four top-performing powders showed.
PRB’s test team also noticed other interesting trends in the data. For example, variation in velocity does NOT appear to be linear across the full range of temperatures. By that, they mean the change per degree from 20° to 65° might be smaller or larger than the change per degree from 65° to 140°.
Well folks, it’s July 1st already — the means we’re moving into “peak heat” summer conditions. It’s vitally important to keep your ammo at “normal” temps during the hot summer months. Even if you use “temp-insensitive” powders, studies suggest that pressures can still rise dramatically when the entire cartridge gets hot, possibly because of primer heating. It’s smart to keep your loaded ammo in an insulated storage unit, possibly with a Blue Ice Cool Pak if you expect it to get quite hot. Don’t leave your ammo in the car or truck — temps can exceed 140° in a vehicle parked in the sun.
To learn more about how ambient temperature (and primer choice) affect pressures (and hence velocities) you should read the article Pressure Factors: How Temperature, Powder, and Primer Affect Pressure by Denton Bramwell. In that article, the author uses a pressure trace instrument to analyze how temperature affects ammo performance. Bramwell’s tests yielded some fascinating results.
For example, barrel temperature was a key factor: “Both barrel temperature and powder temperature are important variables, and they are not the same variable. If you fail to take barrel temperature into account while doing pressure testing, your test results will be very significantly affected. The effect of barrel temperature is around 204 PSI per F° for the Varget load. If you’re not controlling barrel temperature, you about as well might not bother controlling powder temperature, either. In the cases investigated, barrel temperature is a much stronger variable than powder temperature.”
Powder Heat Sensitivity Comparison Test
Our friend Cal Zant of the Precision Rifle Blog recently published a fascinating comparison test of four powders: Hodgdon H4350, Hodgdon Varget, IMR 4451, and IMR 4166. The first two are Hodgdon Extreme powders, while the latter two are part of IMR’s new Enduron line of propellants.
The testers measured the velocity of the powders over a wide temperature range, from 25° F to 140° F. Hodgdon H4350 proved to be the most temp stable of the four powders tested.
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Behold… the Holy Grail, Hodgdon Varget powder. Among all the rifle propellants on the market, Varget may have been the hardest to find in the last couple of years. But take heart, Midsouth Shooters Supply and Powder Valley Inc. now have 1-pound containers of Varget in stock for immediate delivery. To get to the PVI order screen, from the PVI Home page, click “Powders” then click “Hodgdon”.
Over the years, Hodgdon Varget has proven to be one of the most accurate powders ever created. And it is also exceptionally temp-stable. In the .308 Win, 6mmBR, 6mm Dasher and other popular cartridges, Varget has set many records and won countless matches. It meters well (for an extruded powder) and can be used in a very large range of calibers and cartridge types. If you need Varget… don’t hesitate. Supplies are limited. This may sell out by the end of the day today..
TIME STAMP: This Notice Issued at 9:30 am EST Saturday, June 25, 2016.
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IMR® Legendary Powders now offers four (4) Enduron powders: IMR 4166, IMR 4451, IMR 4955, and IMR 7977. Shooters looking for readily-available alternatives to hard-to-find extruded powders should definitely check out the Enduron line-up. Precision shooters will find an Enduron option well-suited to most of the popular precision cartridge types. For example, IMR 4166 is a good replacement for Hodgdon Varget (commonly used in the .223 Rem, 6mmBR and .308 Win), while IMR 4955 is a fine substitute for H4831 (favored by F-Open shooters for the .284 Win and 7mm WSM cartridges).
Modern Powder Technology for Enhanced Performance
The technology in IMR’s Enduron line of powders provides four very important qualities that enhance both in-gun and downrange performance.
Copper fouling reduction – these powders contain an additive that drastically reduces copper fouling in the gun barrel. Copper fouling should be minimal, allowing shooters to spend more time shooting and less time cleaning a rifle to retain accuracy.
Temperature change stability – the Enduron line is insensitive to temperature changes. Whether a rifle is sighted in during the heat of summer, hunted in a November snowstorm or hunting multiple locations with drastic temperature swings, point of impact with ammunition loaded with Enduron technology will be very consistent.
Optimal load density - Enduron powders provide optimal load density, assisting in maintaining low standard deviations in velocity and pressure, a key feature for top accuracy.
Environmentally friendly - Enduron technology is environmentally friendly, crafted using raw materials that are not harmful to the environment.
The Enduron Line-Up of Four Powders
IMR now offers four Enduron powders that cover a broad range of burn rates. They are suitable for a wide variety of cartridges, from small varmint cartridges all the way up to the .338 Lapua Magnum.
IMR 4166 possesses the fastest burn rate in the Enduron lineup. It is the perfect burn speed for cartridges such as .308 Win, 7.62mm NATO, 22-250 Rem and 257 Roberts. A versatile, match-grade propellant, IMR 4166 is comparable to Hodgdon® Varget.
IMR 4451 is a mid-range burn speed powder, ideally suited for cartridges such as .270 Winchester, .30-06 and 300 Winchester Short Magnum. This powder is comparable to Hodgdon H4350.
IMR 4955 is a medium burn speed powder, falling in between IMR 4451 and IMR 7977 in burn speed. It provides top performance in big game cartridges such as 25-06, 280 Remington and 300 Winchester Magnum. This powder is comparable to Hodgdon H4831.
IMR 7977 has the slowest burn rate among the Enduron Technology powders. Its loading density is perfect for magnum cartridges and contributes to superb uniformity, yielding outstanding performance in 300 Winchester Magnum, 7MM Remington Magnum and .338 Lapua Magnum. IMR 7977 is comparable to Hodgdon H1000.
The Enduron Technology powders are available in one-pound (1 lb) and eight-pound (8-lb) containers from quality reloading retailers. Learn more about Enduron powders at www.enduronimr.com. For info on other IMR powders, visit www.imrpowder.com.
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This is a grim tale. A man almost lost the use of his right hand, and did suffer terrible injuries to his fingers. All because he picked the wrong bottle of powder off the shelf.
Similar Labels, Disasterous Consequences
The shooter, Denny K., was assembling some rounds for his brand new 7mm-08 Savage hunting rifle. He thought he was loading with Hodgdon Varget. Instead he had filled his powder measure with Hodgdon TiteGroup, a fast-burning pistol powder. The labels are similar, so the mistake is understandable. But the results were devastating. Here’s what 41 grains of TiteGroup can do in a 7mm-08:
Posting on the Firing Line, in a thread entitled “Lucky to Be Alive”, Denny writes:
“This is the hardest post to post. I know if I had read it a week ago my comment would have been: ‘You have no business reloading’. I had everything perfect, except pouring the wrong powder in the powder measure. I type this slowly with my left hand, embarrassed but … possibly saving someone else a tragedy or, like me, a long drive to the Emergency Room and surgery to save my finger.”
The Still-Sealed Bottle of Varget
Denny did not initially comprehend exactly why the kaboom happened. He thought maybe his new Savage rifle was at fault. Then, on his return home, he discovered something…
Denny wrote: “The seven-hour period it took to go to ER, transport to Trauma Center and surgery made me think it was a Savage rifle issue. Brand new rifle, new brass, triple-checked loading data. The next day I was humbled when I realized the Varget powder was still sealed.
I knew what powder to use. I thought [Varget] was what I used. Not until the following day did I realize the Varget was still sealed.”
At that point, Denny realized what caused the accident — “operator error”. He knew he had to warn others about using the wrong powder: “I knew I needed to share my mistake, even though it is embarrassing, just to remind people. I’ve been reloading for 30 years…”
Editor’s Comment: Denny was not a novice reloader. His experience demonstrates that this kind of mistake can be made by any hand-loader, even one with decades of experience. Be safe guys, take your time when you load your ammo. Remove powders from measures after your loading sessions (pistol powders can look very similar to rifle powders). And by all means CHECK the LABEL on the jug. As the TiteGroup label says: “A little goes a long way.”
It’s not a bad idea to separate your pistol powders from your rifle powders, or perhaps even load for pistol in a separate part of your workshop.
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While Varget and Reloder 15 remain in short supply, you can often find IMR 4320 powder back in the shelves of local gun stores. IMR describes IMR 4320 as follows: “Short granulation, easy metering, and perfect for the 223 Remington, 22-250 Remington, 250 Savage and other medium burn rate cartridges.” This older-generation powder is more temp sensitive than the Hodgdon Extreme propellants, but in the right application, it looks to be a viable alternative for folks who can’t source Varget, Reloder 15, and even H4895.
IMR 4320 Shoots Well in the .308 Winchester
A while back, GS Arizona wrote an excellent Riflemans Journal article, IMR 4320 — the Forgotten Powder. GS developed IMR 4320 loads for his .308 Win Palma rifle and competed with IMR 4320-powered ammo at long range matches. He concluded that: “[IMR 4320] appears to be a very useful alternative to some of the harder-to-get powders. The load is working extremely well at 1000 yards. In the [2009] Arizona Palma State Championship, several high placing competitors were using the 4320 load. We got sub X-Ring elevation at 1000 yards from several rifles, and that’s all I’m looking for in a Palma load.”
IMR 4320 Works for Dasher Shooter
Forum member FalconPilot shoots a 6mm Dasher with Berger 105gr Hybrids. Looking for an alternative to Varget, he decided to give IMR 4320 a try. The results were good. FalconPilot reports: “I’ve been looking for other options (besides Reloder 15, which I love, but it’s really dirty). While at a gun shop in Ohio, I ran across 8 pounds of IMR 4320. I had never even heard of it, much less tried it. Getting ready for upcoming mid-range shoots, I loaded five rounds with IMR 4320 to the exact same specs as my winning Varget loads for the 6mm Dasher. This recipe was 32.7 grains of powder, Wolf SMR primer, Berger Hybrid 105 jumped fifty thousandths.” Falcon pilot tested his IMR 4320 load at 600 yards:
As you can see from the photo at the top of this article, FalconPilot had good results — a 1.5″ group at 600 yards. He reports: “This group was shoot during the middle of the day, mirage bad, scope set to 25X. It looks like IMR 4320 is a [very close] replacement for Varget… with a tad bit slower burn rate.” FalconPilot tell us the accuracy with IMR 4320 rivals the best he has gotten with Varget: “This gun has always shot under 2 inches [for 5 shots] at 600 yards, and most of time shoots 1.5 to 1.7 inches.”
For comparison purposes, here are Heat of Explosion and Burn Rate values from QuickLOAD for IMR 4320, and for the popular Reloder 15 and Varget powders. You can see that these powders have similar characteristics “by the numbers”:
Manufacturer
Powder Brand
Heat of Explosion
Burning Rate Factor
IMR
4320
3890
0.5920
Alliant
Reloder 15
3990
0.5200
Hodgdon (ADI)
Varget
4050
0.6150
WARNING — When changing from one powder to another, always start with manufacturer’s stated load data. Start low and work up incrementally. Never assume that loads will be equivalent from one powder to another, even powders with similar burn rates.
What Other Forum Members Say:
I was using IMR 4320 in the mid 70s in my .222 Rem. Darned great powder and I never had a load that was not accurate from the .222 to .30-06 with that powder. — 5Spd
A fine powder overshadowed by the nouveau wave of “gotta have the newest — make me a better shot” powders. Try 4320 in a 22-250 — what a well-kept secret! IMR 4320 meters very well and is a flexible alternative to many of the hard-to-find powders so much in demand. — AreaOne
IMR 4320 was my “go to” powder in my .223 for many many years. This powder and Winchester 55gr soft point bulk bullets (the cheapest bullet I could buy at the time) accounted for thousands of prairie dogs, coyotes, and anything else that needed shooting. I still use IMR 4320 in some .223 loads and am very happy with it still. — pdog2062
I’ve been using it in a .308 Win for several years. I think it is very sensitive to temperature and always waited till the last minute to load my ammo with a close eye on the weekend forecast at the range. IMR 4320 Works pretty good for 155gr Palma and 168gr Hybrid [bullets] in my .308. — JayC
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This is a grim tale. A man almost lost the use of his right hand, and did suffer terrible injuries to his fingers. All because he picked the wrong bottle of powder off the shelf.
Similar Labels, Disasterous Consequences
The shooter, Denny K., was assembling some rounds for his brand new 7mm-08 Savage hunting rifle. He thought he was loading with Hodgdon Varget. Instead he had filled his powder measure with Hodgdon TiteGroup, a fast-burning pistol powder. The labels are similar, so the mistake is understandable. But the results were devastating. Here’s what 41 grains of TiteGroup can do in a 7mm-08:
Posting on the Firing Line, in a thread entitled “Lucky to Be Alive”, Denny writes:
“This is the hardest post to post. I know if I had read it a week ago my comment would have been: ‘You have no business reloading’. I had everything perfect, except pouring the wrong powder in the powder measure. I type this slowly with my left hand, embarrassed but … possibly saving someone else a tragedy or, like me, a long drive to the Emergency Room and surgery to save my finger.”
The Still-Sealed Bottle of Varget
Denny did not initially comprehend exactly why the kaboom happened. He thought maybe his new Savage rifle was at fault. Then, on his return home, he discovered something…
Denny wrote: “The seven-hour period it took to go to ER, transport to Trauma Center and surgery made me think it was a Savage rifle issue. Brand new rifle, new brass, triple-checked loading data. The next day I was humbled when I realized the Varget powder was still sealed.
I knew what powder to use. I thought [Varget] was what I used. Not until the following day did I realize the Varget was still sealed.”
At that point, Denny realized what caused the accident — “operator error”. He knew he had to warn others about using the wrong powder: “I knew I needed to share my mistake, even though it is embarrassing, just to remind people. I’ve been reloading for 30 years…”
Editor’s Comment: Denny was not a novice reloader. His experience demonstrates that this kind of mistake can be made by any hand-loader, even one with decades of experience. Be safe guys, take your time when you load your ammo. Remove powders from measures after your loading sessions (pistol powders can look very similar to rifle powders). And by all means CHECK the LABEL on the jug. As the TiteGroup label says: “A little goes a long way.”
It’s not a bad idea to separate your pistol powders from your rifle powders, or perhaps even load for pistol in a separate part of your workshop.
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Powder Valley Inc. (PVI) now has the new IMR 4166 powder. This is an all-new extruded powder with a burn rate similar to Hodgdon Varget. It is expected to perform well in the .308 Winchester and in 6mm cartridges running the heavier (95-107gr) projectiles. IMR’s press release states: “IMR 4166 [has] a perfect burn speed for cartridges like the 308 Win/7.62mm NATO, 22-250 Remington, 257 Roberts and dozens more.”
IMR 4166 is one of the new Enduron family of propellants. It is formulated to reduce fouling and to be stable across a wide temperature range. If you commonly use Varget, Alliant Reloder 15, Norma 203B, IMR 8208 XBR, or Vihtavuori N140, you might want to try IMR 4166. It is available right now at Powder Valley in both one-pound ($25.45) and 8-pound ($182.75) containers:
IMR is bringing out a new series of advanced-formulation extruded powders. In 2015, IMR will introduce three (3) new Enduron powders: IMR 4166, IMR 4451, and IMR 7977. The new line of IMR Enduron powders feature small kernels for easy metering, plus a built-in copper fouling eliminator. IMR claims that Enduron powders are not sensitive to temperature changes. If this is true, these powders should prove popular, particularly IMR 4166 which seems to be in the Varget/Reloder 15 burn-rate range. With Varget so hard to find, if IMR 4166 proves accurate (and available) we might see many .308 Win shooters make the switch. IMR states that IMR 4166 is a “versatile, match grade propellant”. We’ve been quite pleased with IMR 8208 XBR as a Varget alternative. IMR 8208 XBR is accurate, clean-burning, and offers good velocity. Perhaps the new IMR 4166 will be as good or better.
When will Enduron powders appear on dealers’ shelves? Hodgdon Powder Co., distributors of Hodgdon, IMR, and Winchester powders, says that: “The new IMR Enduron™ Technology powders will be available at dealers in early 2015 in 1-pound and 8-pound containers.” For more information and Enduron LOAD DATA visit imrpowder.com or check the 2015 Hodgdon Annual Manual.
IMR’s press release provides these descriptions of the new Enduron propellants:
IMR 4166 is the first in the series of Enduron™ propellants. It’s a perfect burn speed for cartridges like the 308 Win/7.62mm NATO, 22-250 Remington, 257 Roberts and dozens more.
IMR 4451 Another new Enduron powder that gives top performance in the venerable .30-06, 270 Winchester, and 300 Winchester Short Magnum, to name just a few. This propellant is ideally suited for many mid-range burn speed cartridges.
IMR 7977 is the slowest burn rate Enduron Technology powder. It is a true magnum cartridge propellant with outstanding performance in such cartridges as the .300 Winchester Magnum, 7mm Remington Magnum, .338 Lapua and more.
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Richard Schatz, the “Duke of Dashers”, has done it again. Just look at that group! Believe it or not, that is five shots at 600 yards. There are four shots in one ragged hole, with one a bit to the right. The group, initially measured at between 0.402″ and 0.410″, is very close to an IBS World Record. Assuming (on the high side) that that group measures 0.410″, that works out to 0.065 MOA. Wow.
Schatz, a past IBS 600-yard National Champion, shot this group in a Heavy Gun relay on May 18, 2014 at the Columbus Sportsman’s Association range in Columbus, Wisconsin. Richard was using his trusty 6mm Dasher, a 17-lb Light Gun that he has been shooting for years. His ultra-accurate load consisted of 103gr Spencer Bullets pushed by Varget and CCI 450 primers. The Lapua brass had recently been annealed and he batched his record rounds “by feel” based on the force needed to seat the bullets.
Richard said the group involved a good bit of luck, and perfect timing. The conditions were generally “switchy and difficult” at the match. However, in one Heavy Gun relay, Richard said “the wind flags just dropped straight down at the end of the sighter period. It’s like the range went dead.” Richard had windage on his scope so he just held off to correct for the calm. “I didn’t guess the hold-off correctly”, Richard admitted, “that’s why the shots ended up at the edge of the 9 Ring.”
Twenty Seconds of Near-Perfect Shooting
Richard got his five record rounds down range in about 20 seconds. He can shoot faster but, given the exceptional conditions, he took a little more time to aim: “Because the flags dropped and conditions stayed calm, I slowed down a little. I made more of a deliberate attempt to shoot a small group — a conscious effort to aim more precisely. Normally I’ll try to shoot the quickest I can get the dot close to the center of the X. I was trying to be a little more precise this time.”
Whatever Richard did, it sure worked. That’s a spectacular group — one of the smallest ever shot at 600 yards. Richard, a modest guy, credited the group to good conditions, and good luck: “Like I always say ‘the wind can blow ‘em in just as easy as it blows ‘em out’.” Richard says this rifle, with the current Krieger barrel, can typically put five shots in about two inches at 600 yards, in calm, stable conditions.
Very Close to an IBS Heavy Gun Record
The current IBS 600-yard, five-shot Heavy Gun group record is 0.404″, set by John Lewis in 2008. This recent group by Richard Schatz is very, very close to that mark. At Columbus, Wisconsin, four different measurers examined Richard’s group on May 18th. The four measurements were: 0.402″, 0.403″, 0.410″, and 0.409″ (see photo). Whether or not this is a new record will be determined by the IBS official measurement committee to which the target is being submitted. It’s worth mentioning that Richard Schatz currently holds the IBS 600-yard Heavy Gun score record, with a value of 50 points (and 0.634″ tie-breaker).
Rifle Specifications:
Nesika Action
Krieger 1:8″ twist barrel, 27″ length, 0.236″ bore
Chambered for 6mm Dasher with 0.272″ neck and 0.104″ Freebore
Shehane “Baby Tracker” stock
Nightforce 8-32x56mm NSX Scope
Load Specifications:
Clay Spencer 103gr bullets
Lapua 6mmBR brass (formed to Dasher)
Cases skim-turned for .0035 total clearance
Hodgdon Varget powder, 32.2 grains
CCI 450 primers
Muzzle Velocity 2980 FPS
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Back in May, IBS shooter Rodney Wagner shot a 0.349″ (50-2X) 5-shot group that became the talk of the shooting community. This was the smallest 600-yard group shot in the history of recorded rifle competition. Rodney’s group cuts the existing IBS 600-yard record in half. Rodney put five shots under the size of a dime at the distance of six football fields. Just pause and think about that…
News of this amazing feat spread like wildfire via the internet. People were amazed at what Rodney accomplished. Here are some actual comments posted on various shooting forums:
308Nut: Simply Astounding.
Coues Sniper: That’s insanity.
PapaJohn: I strut around like a peacock if my rifles will shoot under a half-inch at 100 yards. His group was better than that at six times the distance… that’s just unfathomable. I don’t see anyone breaking that record for a loooooooooooong time!
Given the spectacular (and historic) nature of Rodney’s 600-yard group, many folks wanted to learn more about Rodney’s equipment and his shooting techniques. For that reason, we’ve compiled this follow-up report. Rodney was kind enough to provide a short video showing his equipment and shooting technique. In his video demonstration, Rodney runs off a 5-shot group in about 19 seconds. When he actually shot the 0.349″ group, Rodney estimates he got the five shots down-range in 12-15 seconds. (He slowed down a bit for the video!)
Watch Rodney Wagner Fire Five Shots in Under 20 Seconds
Rodney comments: “You’ll notice I hold the stock with my left hand while working the bolt to keep it from losing its ‘track’ (that slows me down a lot). I have just gotten into the habit of doing that because I feel tracking is one of the most important things not to take for granted. With this technique I don’t have to ‘saw’ the stock into the bags as much when I get on to the record target.”
Record-Setting Load: Varget Powder, CCI Primers, and Berger 108s Jumped
Rodney’s record 0.349″ group works out to 0.055 MOA at 600 yards. To shoot a “zero” group at 600 yards you need the finest components and insanely good reloading techniques (not to mention the grace of God.) As he does with all his 600-yard ammo, Rodney pre-loaded before the match. This particular ammo had been loaded 5-6 days before the match. Here are specs on Rodney’s load:
32.5 Grains of Hodgdon Varget Powder and CCI 450 Primers.
108gr Berger BT Match bullets seated 0.020″ away from the lands.
Lapua 6mmBR brass fire-formed to 6 Dasher and turned to 0.265″ loaded round for a 0.268″-neck chamber.
Neck-sized with a 0.262″ Redding bushing.
Note that Rodney was using Berger 108s, not the 105gr VLDs or Berger’s popular 105gr Hybrids. Rodney found his Brux barrel shot best with the 108s: “I’d get really nice 4-shot groups with the VLDs, but it seemed there would be four together and one out. The 108s seem to have less fliers.” Rodney experimented with seating depths before he settled on a .020″ jump: “I shot them for a long time 3 to 5 thousandths in the lands, just barely in the lands. But I knew Sam Hall had really good luck jumping. So I went to .020″ jump and it all came together. The 108s have shot good like that in three different Brux barrels (all chambered with the same reamer) so I just start at that setting now — twenty off the lands.”
Record-Setting Equipment
Rodney was shooting a 17-lb Light Gun. It features a BAT Machine ‘B’ action, and a 29″ Brux barrel chambered for the 6mm Dasher with a 0.268″ neck. The 0.236″-land, 4-groove barrel was fairly new when the record group was shot — it had about 300 rounds through it, and had shot 30 rounds since its last cleaning. Rodney chambered the barrel himself. The stock is a Shehane ST-1000 fiberglass tracker, inletted and bedded by Tom Meredith. A March 10-60x52mm scope is held in Burris Signature Zee rings on a +10 MOA rail. These rings are inexpensive, but they work just fine, notes Rodney: “With the inserts I can align the scope mechanically and keep the windage pretty much centered in its travel.”
Supporting his rifle, Rodney used a Farley co-axial rest up front (on Super-Feet) and a Protektor Doctor bag in the rear. The Farley features a Borden top carrying an Edgewood bag. Rodney notes: “In the front, I use the black diamond blasting sand, because it doesn’t pack as hard as regular sand. You can buy it at tractor supply stores in the welding section. It’s not as heavy as heavy sand.”
In the rear, Rodney runs a flat-top Protektor Doctor bag with Cordura ears. Rodney uses Sinclair heavy sand in his rear bag. He says “it’s got some squish — not much but just a little — call it a medium-hard fill”. Interestingly, Rodney sets up the bag so that the flat on the bottom of the stock rides on the stitches between the ears: “I like the stock to touch the top of the bag between the ears — I don’t like to see daylight.”
Conditions for the Record — You May Be Surprised
Many folks who have commented on Rodney’s 0.349″ group have wrongly assumed that the 0.349″ group was shot in “perfect” zero-wind conditions. Not so. There were switchy 5 mph winds with gusts to 10 mph. Rodney notes that on his second target of the day, he had to hold in three different places to manage a decent-sized group. So for those who think the group was shot in miraculous conditions, we have to say that wasn’t the case.
Creating Ultra-Accurate 6mm Dasher Ammunition
Rodney takes great care in loading his brass, and he employs a few tricks to get superior consistency.
Fire-Forming — To prepare his cases for fire-forming, Rodney starts by turning his Lapua brass to just past where the new neck-shoulder junction will be: “I just cut enough for the 6mm Dasher neck. A little bit of the cut shows on the shoulder after forming.” Then Rodney runs a .25-caliber K&M mandrel through the whole neck, expanding the neck diameter. After the entire neck is expanded, Rodney re-sizes the top section with a Wilson bushing, creating a false shoulder. Then, as further insurance that the case will be held firmly in place during fire-forming, Rodney seats his bullets long — hard into the lands. When fire-forming, Rodney uses a normal 6mmBR load of 29.8 grains of Varget: “I don’t like to stress my brass before it has been hardened. I load enough powder to form the shoulder 95%. Any more than that is just wasted.” Rodney adds: “When fire-forming, I don’t want to use a super-hard primer. I prefer to use a Federal 205, CCI 200, or Winchester — something soft.” Using a softer primer lessens the likelihood that the case will drive forward when hit by the firing pin, so this helps achieve more consistent “blow lengths”.
Ammo Loading — Rodney is fastidious with his brass and weighs his charges very precisely. Charges are first dispensed with an RFD manual powder measure, then Rodney trickles kernel by kernel using a highly-precise Sartorius GD-503 laboratory scale. He tries to maintain charge-weight consistency within half a tenth of a grain — about two kernels of Varget powder.
One important technique Rodney employs is sorting by bullet-seating force. Rodney batch-sorts his loaded rounds based on seating force indicated by the dial gauge on his K&M arbor press: “I use a K&M arbor press with dial indicator strain gauge. When I’m loading I pay lots of attention to seating effort and I try to batch five rounds that feel the same. For record rounds I try to make sure I get five of the same number (on the dial). When sorting based on the force-gauge readout, you need to go slow. If you go too fast the needle will spike up and down before you can see it.”
In practice, Rodney might select five rounds with a gauge value of 25, then another five with a gauge read-out of 30 and so on. He places the first five like-value rounds in one row of his ammo caddy. The next like-value set of five will go in the next row down. By this method, he ensures that all five cartridges in a five-round set for a record target will have bullets seated with very consistent seating force.
Unlike some top shooters, Rodney does not regularly anneal his cases. However, after every firing, he does tumble his Dasher brass in treated corncob media. After sizing his brass, before seating the bullets, he runs a nylon brush in the necks: “The last thing I do before firing is run a well-worn 30 caliber nylon brush in the necks, using a small 6-volt drill for power. This is a quick operation — just in and out the neck”. Sometimes, at the end of the season, he will anneal, but Rodney adds: “If I can get 10 firings out of the case I’ve done good.” He usually makes up new brass when he fits a new barrel: “If it is a good barrel (that I may shoot at the Nationals), I’ll usually go ahead and prepare 200 pieces of good brass.”
Shooting Techniques — Piloting a 600-yard Group into the Zeros Gun-handling and Rate of Fire — As you can see from the video, Rodney shoots with very minimal contact on the rifle. He normally shoots a string fast, but he remains calm and steady — almost machine-like. In the video he runs five shots in about 19 seconds, but he figures he shot the 0.349″ group in 12-15 seconds. Rodney says: “I’m not quite as fast as Sam Hall but I can usually run ‘em under fifteen seconds, sometimes closer to 10 on a good day. But when I shot the 0.349″ I couldn’t see the flags for the last shot so I dipped the joystick down between 4th and 5th shots, and that took a couple seconds. The flags had not changed, so I kept the same point of aim for 4th and 5th shot. I’d been watching that flag all morning, so to satisfy my curiosity I kind of dipped down for a second.”
Aiming for the Nine — To shoot ultra-small at long range, you must aim very, very precisely. When shooting at 600 yards, Rodney lines up his cross-hairs on the white number “9” in the blue field above the ten ring. This is visible through his rifle-scope at 600 yards, and it provides an aim point smaller than the center “X”.
Rodney explains: “I always aim for the number 9 up in the blue field. It provides for a smaller aim point. I noticed a difference when I started doing that. I learned that from some guys from South Dakota. It made sense so I’ve been doing it ever sense.”
Tips for 600-Yard Shooters New to the Game
In the course of our interview with Rodney, we asked if he had any tips for shooters who are getting started in the 600-yard Benchrest Game. Rodney offered some sensible advice:
1. Don’t try to go it alone. Find an old-timer to mentor you. As a novice, go to matches, watch and ask questions.
2. Go with a proven cartridge. If you are shooting 600 yards stick with a 6mmBR or one of the 6BR improveds (BRX or Dasher). Keep it simple. I tried some of the larger cartridges, the 6XC and 6-6.5×47 Lapua. I was trying to be different, but I was not successful. It wasn’t a disaster — I learned something. But I found the larger cases were not as accurate as a 6BR or Dasher. Those bigger cartridges are competitive for score but not for group.
3. You don’t have to spend a fortune to be competitive. Buy a used rifle from somebody and find out if you like the sport. You can save a lot with a used rifle, but do plan on buying a new barrel immediately.
4. Don’t waste weeks or months struggling with a barrel that isn’t shooting. My best barrels, including this record-setting Brux, started shooting exceptionally well right from the start.
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To learn more about how ambient temperature (and primer choice) affect pressures (and hence velocities) you should read the article 
While Varget and Reloder 15 remain in short supply, you can often find IMR 4320 powder back in the shelves of local gun stores. IMR describes IMR 4320 as follows: “Short granulation, easy metering, and perfect for the 223 Remington, 22-250 Remington, 250 Savage and other medium burn rate cartridges.” This older-generation powder is more temp sensitive than the Hodgdon Extreme propellants, but in the right application, it looks to be a viable alternative for folks who can’t source Varget, Reloder 15, and even H4895.
Back in May, IBS shooter Rodney Wagner shot a 0.349″ (50-2X) 5-shot group that became the talk of the shooting community. This was the smallest 600-yard group shot in the history of recorded rifle competition. Rodney’s group cuts the existing IBS 600-yard record in half. Rodney put five shots under the size of a dime at the distance of six football fields. Just pause and think about that…
One important technique Rodney employs is sorting by bullet-seating force. Rodney batch-sorts his loaded rounds based on seating force indicated by the dial gauge on his K&M arbor press: “I use a K&M arbor press with dial indicator strain gauge. When I’m loading I pay lots of attention to seating effort and I try to batch five rounds that feel the same. For record rounds I try to make sure I get five of the same number (on the dial). When sorting based on the force-gauge readout, you need to go slow. If you go too fast the needle will spike up and down before you can see it.”
Aiming for the Nine — To shoot ultra-small at long range, you must aim very, very precisely. When shooting at 600 yards, Rodney lines up his cross-hairs on the white number “9” in the blue field above the ten ring. This is visible through his rifle-scope at 600 yards, and it provides an aim point smaller than the center “X”.
