In his Riflemans Journal Blog, German Salazar has authored an excellent article on IMR 4320 — The Forgotten Powder. German tested IMR 4320 and found that it produced outstanding results both in the .308 Winchester and the 30-06. This means that shooters have another very effective propellant option for their .308 and 30-06 match rifles. With H4895 and Varget being hard to obtain lately, you may want to give IMR 4320 a try.
German writes: “IMR 4320 falls right between 4895 and 4064 on the burn rate scale for most cartridges — in other words, right where Varget falls. Yet, despite having a very useful burn rate, 4320 has languished for decades while newer powders of similar burn rate have gained in popularity. I was interested in seeing what current production IMR 4320 would do in the .308 with the 155gr Palma bullets. My interest was sparked by the obvious fact that Varget and H4895 have been very hard to get lately while IMR 4320 sits on the shelves.”
German loaded up some .308 Win loads with IMR 4320 and moly-coated Sierra 155gr Palma bullets. German’s “practical max” load delivered 2990 fps in his long-barreled Palma rifle. This is certainly competitive speed-wise.
German observed that: “IMR 4320 has very small granules and throws very consistently from the powder measure — it is very much like Reloder 15 in granule size — so for those who prefer to throw charges it’s a good choice.”
Satisfied with the chron results, German loaded more rounds with the two most promising charge weights and used them in a 500-yard prone match at Ben Avery (ambient temps were 60s-80s F). Here is his report:
“As in the chrono tests, all IMR 4320 loads were with moly-coated Sierra 155 Palma bullets, Winchester brass and PMC primers. Powder charges should be reduced at least 1.0 grain for bare bullets. The load with 45.0 grains of IMR 4320 gave me a 199-12X with the single 9 being a high shot just off the 10 ring line at 12:00. Overall, I would rate that load as good, very useable for the intended purpose of 500 or 600 yard shooting (it’s 2844 fps) but no better than my H4895 load for that purpose.
Next I fired the heavier 47.0 grains ‘practical max’ load and that was an eye opener. The score was 200-15X in conditions that were windier than those in which the first load was fired. Elevation was noticeably tighter and shots were exactly on call. This load gives 2990 fps, so it has real potential as a Palma load. While no 500-yard test can ensure results at 1000, given the MV and reasonably low SD of this load as well as the good performance at 500, I won’t hesitate to shoot it at 1000 at the first opportunity. Warning: this was a STRONG LOAD and may not be safe in your gun.
Overall, I’m very satisfied with what I’ve seen in these past few days from IMR 4320 and plan to shoot it in some of our upcoming Palma and 1000-yard matches with the 155s. It appears to be a very useful alternative to some of the harder to get powders.”
IBS Annual Meeting on January 11-12 in Pennsylvania
The 2013 International Benchrest Shooters (IBS) Membership Meeting will be held January 11 and 12, 2013 at the Harrisburg Holiday Inn and Conference Center. There will be a 7:00 pm social gathering on Friday the 11th. The Open Membership begins Saturday the 12th at 9:00 am. Ballots are currently being mailed and all will be in mail by Tuesday December 4th. If you have not received your ballot by December the 11th contact Joan at joan [at] internationalbenchrest.com
The Holiday Inn and Conference Center is located at 145 Sheraton Drive, New Cumberland, PA 17070 (Off the I-83 at PA turnpike). Call (717) 774-2721 for reservations.
IBS and Precision Shooting Magazine
Since 1970, the IBS has used Precision Shooting Magazine as it official publication; the magazine ceased printing effective November 2012. Obviously, this situation is not of our making yet we have to deal with it nevertheless. As a result of PS’s apparent demise, the IBS must seek another way to keep its membership informed. The Executive Board met via teleconference on November 15, 2012 and voted to put the issue to the membership.
Agenda Item ballots will be mailed on or about November 28th and will also include a simple survey form. Members will be asked to register their preference for one of two options. Those options are: integrate IBS information and match reports into Precision Rifleman (the new NBRSA magazine), which will require a dues increase to $60; OR use the current IBS website-with enhancements-as the way to communicate with members. The latter option will result in a reduction in dues by 20% to 40%.
All ballots and surveys must be postmarked by January 1, 2013. I encourage ALL members to respond. The Executive Board will make a final decision on January 12th.
Jeff Stover, IBS President
IBS Tentative 2013 Event Schedules are posted
Shooters can start marking their calendars for the upcoming shooting season. The IBS has compiled a “tentative” schedule for 2013 matches. Click the links below to view the Short-Range Group, Short-Range Score, and Long-Range Schedules for next year (PDF files):
We are organizing our crew for the 2013 SHOT Show, which runs January 15-18 in Las Vegas, at the Sands Expo Center. To whet your appetite, here is a product report from SHOT Show 2010 that you may have missed the first time around. In this video Robert Ruch, CFO of Forster Products, shows off the Forster’s 3-in-1 Case Trimming Tool. This is a very smart tool that can dramatically speed up your case prep operations.
Tool Cuts Brass to Length, and Chamfers Inside and Outside
Forster’s new 3-in-1 Carbide cutting tool works with all existing Forster case trimmers. This unit does three jobs at the same time. It trims the case to length, it puts a 14-degree chamfer on the INSIDE of the neck, AND (last but not least), it cuts a 30-degree chamfer on the OUTSIDE of the neck. It does this all quickly and efficiently — in a matter of a few seconds. We tested the new tool ourselves on a few cases. The tool is solid and well made. The carbide cutting tips do perform a very clean cut. Be aware, however, if you have turned your necks already, you may have to reset the blade positions before you start trimming your brass.
Forster’s CFO, Robert Ruch, demonstrates the 3-in-1 case trimming/chamfering tool in the video below. As you can see, the tool turns very smoothly (no chatter) and the job is finished in a few seconds. The actual cutting time, per case, is just a few second. The tool has an MSRP of $70.00, but we expect it to sell for around $50.00 at major vendors. It can be fitted on Forster trimmers and other hand lathes with a .490″ shaft diameter.
John Whidden Demonstrates Forster Co-Ax Press and Trimmer
In this promo video, produced for the Outdoor Adventure ‘What-the-Stuff’ TV show, John Whidden of Whidden Gunsworks, talks about the benefits of precision case trimming and demonstrates how to use the unique Forster Co-Ax Press.
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Doan Trevor is a master gunsmith and stock-maker who works in the old style. He still hand-crafts stocks from start to finish, and does all the metal-work on the custom rifles he builds. Starting with highly-figured woods, Doan carves and shapes his stocks largely by hand, with meticulous attention to detail. Each rifle he builds is optimized for its intended discipline, and custom-fitted for the customer.
With the help of his talented wife Sue (who does the photography and builds the web pages), Doan has created a wonderful website, DoanTrevor.com, that is a feast for the eyes. You can see beautiful wood-stocked rifles being hand-crafted. Doan also illustrates how he creates custom metal parts, and how he beds barreled actions into the finished stocks.
Set aside a few minutes and visit Doan’s website. Be sure to click on the site’s secondary pages: Rifle Building, Woodworking, and Metalworking. You’ll find dozens of high-quality photos and fascinating information on gun-building.
For more information, visit DoanTrevor.com, or call (505) 890-0368, 10am-5pm M-F.
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SCATT Company, based in Russia, produces an advanced marksmanship training aid that is now being used by many of the world’s top prone and position shooters. The SCATT system uses a gun-mounted infrared (IR) sensor that precisely tracks the movement of the rifle during the aiming process. This tracking data can then be displayed on a computer screen or special electronic targets. In development since 1991, the SCATT system was first employed by the Russian Federation shooting team. However, the SCATT technology was released commercially and is now being used by many other national teams including: USA, China, France, Germany, Japan, and Switzerland.
SCATT Training Systems employ an electronic optical sensor fixed to a gun’s barrel, frame, or the compressed air cylinder of an air gun. The shooter then aims at the electronic target. A trace of the point of aim can then be followed on a ‘real-time’ display screen. When the shooter pulls the gun’s trigger, the point of impact is then displayed on the screen. (This is dry-fire only — no projectiles are loaded). All results of training sessions can be recorded for later analysis. Russian research has shown that SCATT training is both effective and efficient. Using SCATT, beginning marksmen can acquire competitive skills two to three times more quickly than with conventional practice methods alone.
SCATT Shows How an Olympian Holds
The video below shows the aiming patterns of Olympic bronze medalist Miss Snježana Pejčić, a 10m Air Rifle shooter. The SCATT system records the air rifle’s muzzle motions as green traces while Snježana dials in her aim. Her final shot positions (and scores) are recorded when the large circle appears.
SCATT Company has dealers worldwide for its training systems, electronic targets, and shooting accessories. To order SCATT systems in the USA, contact:
Center Shot Sports
www.CenterShot.com
4300 Rogers Ave., Suite 20,
Box 213
Fort Smith, AR 72903
Phone: 479-262-2584
E-mail: info [at] centershot.com
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If you’re looking for an affordable holiday gift for a shooting buddy or family member, a gift that will be appreciated month after month, consider a magazine subscription. Every month your buddy or relative will get something new in the mail — so it’s like sending a dozen gifts over the course of the year. Your Editor receives a couple magazine subscriptions that were gifts from my brother, and I really do look forward to the magazines’ arrival in my mailbox each month. And each time I open up a new issue of Nat Geo or Shooting Times I think, “Thanks Bro — that was a thoughtful gift — you made my day.”
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In our Shooters Forum, one newcomer wanted some advice on selecting a reticle for F-Class optics. He wondered about the advantage of Forward Focal Plane (FFP) vs. conventional scopes and also wondered if one type of reticle was better for “holding off” than others.
In responding to this question, Forum regular Monte Milanuk provided an excellent summary of aiming methods used in F-Class. For anyone shooting score targets, Monte’s post is worth reading:
Aiming Methods for F-Class Shooting — by Monte Milanuk
F-Class is a known-distance event, with targets of known dimensions that have markings (rings) of known sizes. Any ‘holding off’ can be done using the target face itself. Most ‘benefits’ of forward focal plain (FFP) optics are null and void here — they work great on two-way ranges where ‘minute of man’ is the defining criteria — but how many FFP scopes do you know of in the 30-40X magnification range? Very, very few, because what people who buy high-magnification scopes want is something that allows them to hold finer on the target, and see more detail of the target, not something where the reticle covers the same amount of real estate and appears ‘coarser’ in view against the target, while getting almost too fine to see at lower powers.
Whether a person clicks or holds off is largely personal preference. Some people might decline to adjust their scope as long as they can hold off somewhere on the target. Some of that may stem from the unfortunate effect of scopes being mechanical objects which sometimes don’t work entirely as advertised (i.e. one or two clicks being more or less than anticipated). Me personally, if I get outside 1-1.5 MOA from center, I usually correct accordingly. I also shoot on a range where wind corrections are often in revolutions, not clicks or minutes, between shots.
Some shooters do a modified form of ‘chase the spotter’ — i.e. Take a swag at the wind, dial it on, aim center and shoot. Spotter comes up mid-ring 10 at 4 o’clock… so for the next shot aim mid-ring 10 at 10 o’clock and shoot. This should come up a center X (in theory). Adjust process as necessary to take into account for varying wind speeds and direction.
Others use a plot sheet that is a scaled representation of the target face, complete with a grid overlaid on it that matches the increments of their optics — usually in MOA. Take your Swag at the wind, dial it on, hold center and shoot. Shot comes up a 10 o’clock ‘8’… plot the shot on the sheet, look at the grid and take your corrections from that and dial the scope accordingly. This process should put you in the center (or pretty close), assuming that you didn’t completely ignore the wind in the mean time. Once in the center, hold off and shoot and plot, and if you see a ‘group’ forming (say low right in the 10 ring) either continue to hold high and left or apply the needed corrections to bring your group into the x-ring.
Just holding is generally faster, and allows the shooter to shoot fast and (hopefully) stay ahead of the wind. Plotting is more methodical and may save your bacon if the wind completely changes on you… plotting provides a good reference for dialing back the other way while staying in the middle of the target. — YMMV, Monte
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If you don’t own an in-vehicle GPS yet, you should strongly consider getting one. By routing you efficiently to your destination, a good GPS can save you time and save you money (by burning less fuel). By fixing your precise location, a GPS also performs a safety function should your vehicle break down or should you have some other emergency.
Here is a smokin’ deal on a very fine GPS, in the new, larger 5″-wide format. Right now, on Amazon.com you can get the Garmin Nüvi 50LM 5-Inch GPS Navigator with Lifetime Maps (USA) for just $99.99. This unit, the #1 – selling GPS on Amazon.com, features a big 5” (12.7 cm) touchscreen, spoken turn-by-turn directions, and more than 5 million points of interest (POIs). With the price of gas these days, the Garmin Nüvi 50LM can pay for itself in a few months of use.
NOTE: The $99.99 Amazon deal is a special promo price that may not last long — you snooze you loose! Right now, this same unit sells for $120 at Walmart, $140 at Fry’s, and $163 at Sears!
Free USA Maps Updated Four Times a Year
At just $99.99, the Garmin Nüvi 50LM is an exceptional value because it includes Lifetime Maps for the USA. This entitles you to FREE map updates up to four times a year, as long as you live. Along with the pre-loaded map data, this unit ships with: vehicle suction cup mount, vehicle power cable, USB cable (for synching with your computer), and a Quick start manual.
Note: The Garmin Nüvi 50LM gives you spoken turn-by-turn navigation, but it is NOT voice-activated. In other words, the 50LM will NOT react to the driver’s Voice Commands, nor will it locate a destination by voice input. We don’t think that is really much of a shortcoming. This Editor owns a Garmin with voice-recognition. It was amusing for a day or so, but I ended up turning the Voice Command feature off because it was unreliable. I found that it was much faster and easier to just tap the buttons on the touch screen for all important functions.
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Bill Gravatt, President of Sinclair International, has chosen to leave his current position with Sinclair International, where he has served for 22 years. Bill told us “I sold Sinclair International to Brownells, Inc. in 2007 and have completed my five-year contract as part of the transition process. I had the opportunity to remain as President after my contract expired but, after giving the matter a great deal of thought over the past six months, I felt it was time to move in a new direction. I wish everyone at Sinclair International and Brownells all the best in the future.”
In Sinclair’s Reloading Press Blog*, Bill thanks Sinclair customers for their patronage and assures readers that Sinclair will continue to provide same high level of customer service.
Message from Bill Gravatt As you know, I sold Sinclair International to Brownells a while back. Pete and Frank Brownell and I had known each other for years, and we all agreed that the two companies would be a good fit, both in the way we treat customers as valued friends and the way our respective customer bases are complementary, similar but not identical. We also agreed that I would stay on as President of Sinclair for five years to help manage the transition.
The five years ended last summer, and now under the Brownells stewardship, Sinclair will continue to serve its customers — you — with the same care and consideration my father-in-law Fred Sinclair and I would give you. I consider it a privilege and a pleasure to have been able to serve you over the years.
Now it’s time to move on with the next (actually the third) phase of my adult life (some of you may know the first phase was the nuclear power industry). I’m certainly going to be around… I plan to continue working in the firearms industry, and you’re going to still see me at competitions and events — maybe more than before. I hope to see you at an NRA Show[.]
In the meantime, I plan to spend Christmas the way I hope you do — with friends and family, relaxing and celebrating the blessings of this life. And maybe getting started on that big winter reloading project. Wouldn’t it be great to head into the 2013 shooting season with your ammo loaded up and ready to go? Spring is closer than you think! But first [comes] Christmas — all my best wishes to you and those close to you.
Good Shooting — Bill Gravatt
*Geoff Esterline, a key member of the Sinclair team for over 15 years, has agreed to take over as Contributing Editor of the Reloading Press Blog. Bill has “every confidence” in Geoff’s capabilities.
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You’ve heard of Heavy Metal, maybe even Heavy Water, but what about Heavy Sand? Every serious shooter should know about Heavy Sand for benchrest sandbags. Heavy Sand can weigh up to twice as much as ordinary silica sand (sold as “Play Sand”). By filling your rear bag with Heavy Sand rather than silica sand, you can nearly double the bag’s mass, and that can translate to better bag performance. A heavier bag resists movement and stays aligned better during recoil. If your bag moves during recoil, or becomes misaligned from shot to shot, that can alter your point of impact and open up your groups. Adding weight to your rear bag is a simple, cost-effective way to shoot more consistently, with greater overall accuracy.
Jason tested and compared four kinds of sandbag fillers: Zircon, Chromite, Riverbed Sand, and ordinary Play Sand. Zircon is the heaviest type of sand readily available to shooters, followed by Chromite. Zircon is 98% heavier than Play Sand, while the black Chromite sand is 94% heavier than Play Sand. Riverbed Sand, commonly sold in pet stores as “Reptile Sand”, is less dense, measuring about 55% heavier than Play Sand.
Increase Bag Weight Up to 10 pounds
Compared to silica sand, how much extra weight can Heavy Sand (Zircon, Chromite, Riverbed) add to your sandbag? Up to 10 pounds, depending on the size of your rear bag. Check the chart below for the specifics. By filling a standard bunny ear bag with Zircon (vs. silica sand), you can increase bag weight by about 5 pounds. A super-sized BigFoot bag can gain 10 pounds in overall weight when filled with Zircon as opposed to silica sand.
To learn more about Heavy Sand (and where you can buy it), read Jason’s comprehensive Sand Comparison Article. It includes photos of the different sand types and links to Heavy Sand vendors, such as R.W. Hart (Zircon) and Sinclair International (Chromite).
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Let’s say you’ve purchased a new scope, and the spec-sheet indicates it is calibrated for quarter-MOA clicks. One MOA is 1.047″ inches at 100 yards, so you figure that’s how far your point of impact (POI) will move with four clicks. Well, unfortunately, you may be wrong. You can’t necessarily rely on what the manufacturer says. Production tolerances being what they are, you should test your scope to determine how much movement it actually delivers with each click of the turret. It may move a quarter-MOA, or maybe a quarter-inch, or maybe something else entirely. (Likewise scopes advertised as having 1/8-MOA clicks may deliver more or less than 1 actual MOA for 8 clicks.)
Reader Lindy explains how to check your clicks: “First, make sure the rifle is not loaded. Take a 40″ or longer carpenter’s ruler, and put a very visible mark (such as the center of an orange Shoot’N’C dot), at 37.7 inches. (On mine, I placed two dots side by side every 5 inches, so I could quickly count the dots.) Mount the ruler vertically (zero at top) exactly 100 yards away, carefully measured.
Place the rifle in a good hold on sandbags or other rest. With your hundred-yard zero on the rifle, using max magnification, carefully aim your center crosshairs at the top of the ruler (zero end-point). Have an assistant crank on 36 (indicated) MOA (i.e. 144 clicks), being careful not to move the rifle. (You really do need a helper, it’s very difficult to keep the rifle motionless if you crank the knobs yourself.) With each click, the reticle will move a bit down toward the bottom of the ruler. Note where the center crosshairs rest when your helper is done clicking. If the scope is accurately calibrated, it should be right at that 37.7 inch mark. If not, record where 144 clicks puts you on the ruler, to figure out what your actual click value is. (Repeat this several times as necessary, to get a “rock-solid”, repeatable value.) You now know, for that scope, how much each click actually moves the reticle at 100 yards–and, of course, that will scale proportionally at longer distances. This optical method is better than shooting, because you don’t have the uncertainly associated with determining a group center.
Using this method, I discovered that my Leupold 6.5-20X50 M1 has click values that are calibrated in what I called ‘Shooter’s MOA’, rather than true MOA. That is to say, 4 clicks moved POI 1.000″, rather than 1.047″ (true MOA). That’s about a 5% error.
I’ve tested bunches of scopes, and lots have click values which are significantly off what the manufacturer has advertised. You can’t rely on printed specifications–each scope is different. Until you check your particular scope, you can’t be sure how much it really moves with each click.
I’ve found the true click value varies not only by manufacturer, but by model and individual unit. My Leupold 3.5-10 M3LR was dead on. So was my U.S.O. SN-3 with an H25 reticle, but other SN-3s have been off, and so is my Leupold 6.5-20X50M1. So, check ‘em all, is my policy.”
From the Expert: “…Very good and important article, especially from a ballistics point of view. If a ballistics program predicts 30 MOA of drop at 1000 yards for example, and you dial 30 MOA on your scope and hit high or low, it’s easy to begin questioning BCs, MVs, and everything else under the sun. In my experience, more than 50% of the time error in trajectory prediction at long range is actually scope adjustment error. For serious long range shooting, the test described in this article is a MUST!” — Bryan Litz, Applied Ballistics for Long-Range Shooting.
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In his Riflemans Journal Blog, German Salazar has authored an excellent article on IMR 4320 — The Forgotten Powder. German tested IMR 4320 and found that it produced outstanding results both in the .308 Winchester and the 30-06. This means that shooters have another very effective propellant option for their .308 and 30-06 match rifles. With H4895 and Varget being hard to obtain lately, you may want to give IMR 4320 a try.
SCATT Company has 
F-Class is a known-distance event, with targets of known dimensions that have markings (rings) of known sizes. Any ‘holding off’ can be done using the target face itself. Most ‘benefits’ of forward focal plain (FFP) optics are null and void here — they work great on two-way ranges where ‘minute of man’ is the defining criteria — but how many FFP scopes do you know of in the 30-40X magnification range? Very, very few, because what people who buy high-magnification scopes want is something that allows them to hold finer on the target, and see more detail of the target, not something where the reticle covers the same amount of real estate and appears ‘coarser’ in view against the target, while getting almost too fine to see at lower powers.
Others use a 
Free USA Maps Updated Four Times a Year
As you know, I sold Sinclair International to Brownells a while back. Pete and Frank Brownell and I had known each other for years, and we all agreed that the two companies would be a good fit, both in the way we treat customers as valued friends and the way our respective customer bases are complementary, similar but not identical. We also agreed that I would stay on as President of Sinclair for five years to help manage the transition.
Reader Lindy explains how to check your clicks: “First, make sure the rifle is not loaded. Take a 40″ or longer carpenter’s ruler, and put a very visible mark (such as the center of an orange Shoot’N’C dot), at 37.7 inches. (On mine, I placed two dots side by side every 5 inches, so I could quickly count the dots.) Mount the ruler vertically (zero at top) exactly 100 yards away, carefully measured.
