Lake City vs. Lapua — which brass is harder? And how about Remington vs. Winchester? Is the widely-held belief that Win brass is harder than Rem brass really true? To help settle these burning questions (raised in a Forum thread), Forum member Catshooter recently sampled the base hardness of four brands of .223/5.56 brass. He employed a very impressive tool for the task — a $2,500 Ames Hardness Gauge. Catshooter explained that his Ames Guage “is FAA certified and approved for testing aircraft engine parts — it does NOT get any better than that!”
Catshooter measured four cases picked at random from batches of Lake City (LC) 2008 (5.56x45mm), Lapua .223 Rem Match, Winchester .223 Rem, and Remington R-P .223 Rem.
Lake City
Lapua Match
Winchester
Remington
Photo Shows Ames Gauge Base Hardness Measurement on Lake City Brass
Photo Show Ames Gauge Base Hardness Measurement on Winchester Brass
TEST RESULTS
Using Rockwell hardness standards (.062″x100kg, Rockwell “B”), the brass measured as follows:
LC 2008 = 96
Lapua 223 Match = 86
Winchester 223 = 69
Remington “R-P” = 49
Summary of Test Results
Catshooter writes: “For all you guys that have believed that Winchester cases were tougher than Remington — you are vindicated, they are a lot tougher! However, Lake City and Lapua are ‘the pick of the litter'”. Catshooter notes that both Lake City and Lapua are significantly harder than either Winchester and Remington .223 brass. That’s something that we’ve observed empirically (Lapua and LC stand up better to stout loads), but now we have some hard numbers to back that up. Hats off to Catshooter for settling the hardness debate with his Ames Hardness Gauge.
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Lapua’s Scenar-L bullets are extremely consistent in weight and dimensions. In our tests, the 6mm 105gr Scenar-L proved to be as uniform in weight and base-to-ogive length as any factory bullet we’ve ever measured. Scary consistent. Now there is a full line-up of Scenar-L bullets in .224, 6mm, 6.5 mm, 7mm, and .308 calibers. Yes, that’s right, Lapua now makes a 7mm match bullet. In fact, Lapua makes two: a 150-grainer and a big, high-BC, 180-grainer.
All these Scenar-L bullets are carried by Grafs.com. There are good supplies in most calibers, but the 7mm 180s (item LU4PL7401) are nearly sold out, and the 6mm 105-grainers are sold out. More of these popular 6mm and 7mm projectiles should arrive later this summer.
FREE HAT with Lapua Purchase
For a limited time, if you purchase Lapua bullets, brass, or loaded ammo from Grafs.com, you can get a FREE Lapua cap. NOTE: Quantities are limited, and this offer is restricted to one per customer.
In the above video, Peder Mørch Pedersen demonstrates the accuracy of Scenar-L bullets in a Blaser R8 GRS rifle chambered in 6mmBR Norma. Peder was shooting from bipod at 300 meters on a sunny day in Vingsted, Denmark.
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Team Smith & Wesson shooter Julie Golob has a message for this Mother’s Day (Sunday, May 11th). Julie writes: “While some are using Mother’s Day week to push a gun control agenda, I’d like to encourage moms to ‘Take a Moment’. Talk to your kids about firearms safety. Help them learn what to do around firearms and have an open, honest discussion about guns and gun safety.
I truly believe that, no matter if you are pro-gun or anti-gun, everyone should know and understand the basic rules of firearm safety. It is equally important for parents to have the discussion about guns and what to do if your child finds one. Both the NSSF’s Project ChildSafe and the NRA’s Eddie Eagle GunSafe® Program are excellent. They offer resources for parents, educators, and child care providers to help ensure kids stay safe.
Julie encourages all who read this to share the message. So far, on Facebook, the “Take a Moment” image has been shared 639 times, and seen by 66,112 people. That’s the power of the internet. Julie says: “Thank you all so much for helping me spread the importance of firearms safety.”
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We first ran this story a year ago. Since then, many readers asked us: “Is there a good article that explains how to get started in F-Class?” Indeed there is… Rod Vigstol provides tips for F-Class rookies, plus a checklist of items to bring to the range.
How Easy it is to Have Fun with Rifles and Equipment You Probably Already Have….
Forum member Rod Vigstol (aka Nodak7mm) has written a great Introduction to F-Class for shooters getting started in this rewarding discipline. Rod’s article, which appears in German Salazar’s Rifleman’s Journal website, covers F-Class basics and addresses concerns that “newbies” may have when trying a new shooting sport. Rod stresses that most guys who own a varmint-hunting or tactical rig likely have nearly all the gear they need to give F-Class competition a try.
Rod explains: “If you’re reading this, you have more than just a general interest in the shooting sports and in the awesome rifles that shoot tiny groups at insane distances. You probably even have friends that enjoy shooting as much as you do. The quandary you may find yourself in is your friends haven’t quite jumped into it head-first like you have and they haven’t spent a lot of money and time obtaining the equipment you have to go shoot these matches. But you know what? Your prairie-dog shooting buddy or coyote-hunter friend can attend these matches and shoot alongside with you. He or she more than likely already has the basic equipment needed to shoot a match.” Most varmint shooters already have a suitable, accurate rifle and the following equipment:
• A variable-power scope in the 4.5-14x range or higher.
• A front bipod like the trusty old Harris 9″-13″, or maybe even a basic pedestal front rest.
• A rear sand-bag or similar sand-sock to rest the butt stock.
• A basic shooting mat from Midway or at least a piece of carpet or canvas to lay on.
Rod also provides a handy checklist of items to bring to the range. These include: Canvas or carpet strip (to set under bipod), Notebook, Kitchen Timer, Cleaning Rod, Camp Chair, Elbow Pads, Shooting Hat, and Open Bolt Indicator (OBI). Along with rifle, bipod (or front rest), rear bag, and ammo, that’s pretty much all you need.
Rod encourages all shooters to give F-Class a try — even novices. Rod explains: “We have all been rookies, newbies, new kids on the block or whatever. So we all have a good idea of what may be going on in your mind, the questions and concerns you may have. I’m telling you this sport is full of fantastic people who deep down find it far more fulfilling to help a new shooter get started than running a clean target. You just have to take the first step to get involved.”
Need .223 Rem ammo for your early summer varmint safari? Grafs.com has you covered. Over the past few months, Graf & Sons has acquired a large supply of .223 Rem ammo from a variety of manufacturers. Now Grafs.com has a great selection of .223 Rem ammo, with many items marked down on sale. You’ll find name-brand ammo for as little as $9.99 per 20-ct box (American Eagle 50gr JHP). If you prefer heavier bullets for longer-range shooting, check out the PRVI Partizan ammo loaded with 75gr HPBT match bullets — this is just $10.99 per per 20-ct box.
Forum member Eric has built an innovative specialty pistol for long-range benchrest. The gun is chambered in 6.5-284 and built for IBS 1000-yard shooting. Eric originally built the gun with a 3″-wide fore-end, then decided to go with a 6″-wide offset design since the IBS no longer restricts Light Gun Forearms to three inches. Eric explained: “After building the 3″-wide stock I looked at the IBS 1000-yard benchrest rules and found out that there was not a width limit and rails were allowed for a Light Gun stock. I set out to design a 6″ version. I was thinking it should be offset also to help control torque and track straighter. I had a new 6.5mm, 1:8.5″ twist, 1.250″ HV-contour Krieger barrel. I chambered the barrel for 6.5-284 and bedded the stock.”
Eric feeds his pistol Sierra 142gr MatchKings with a load of 51.0 grains of H4831sc. Estimated muzzle velocity with this load is 2900 fps — respectable speed from the short barrel. The gun tracks remarkably well, with very little torque effect, as you can see in the video below.
After initial testing, Eric added a muzzle brake to the barrel. This tamed the recoil considerably. To learn more about Eric’s long-range 6.5-284 pistol, visit our Shooters Forum and READ this POST. To see more videos of the pistol in action (with muzzle brake), visit Eric’s PhotoBucket Album.
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USAMU Service Rifle shooter/instructor SSG Brandon Green set a new national record this past week, shooting a 500-33X in the individual Aggregate, National Match Course (NMC) with metallic sights. Green was near-perfect in the 200-yard Rapids, shooting an amazing 100-9X. Green was shooting a Tubb 2000 bolt-action rifle chambered in 6XC. He set the new record using Norma factory ammo. Yep, this was factory 6XC ammo, right out of the box.
National Record Score Card of SSG Brandon Green
SSG Green is the current NRA High Power National Champion and Interservice Rifle Champion. He and the rest of the USAMU rifle team have trained hard for the 2014 season. Yet Brandon joked about his record-setting performance, noting that the record was shot with his “back-up” gun. On his Facebook page, Brandon posted: “500-33X NMC. Not positive, possibly a record [Editor: Yes it was.] Not too bad for a #2 gun.” Not too bad indeed, Brandon. Congratulations on this achievement. This bodes well for Green’s goal to win a second straight National High Power Championship at Camp Perry this summer.
Note: After setting a National Record with 500-33X during the individual match with his Tubb 2000, SSG Green followed with a 498 the following day using a Service Rifle during the team match. Remarkable.
File photo of Green with Service Rifle (posed publicity photo).
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Forum Member Roy B. has found a website with scores of well-researched articles about guns and shooting. The Firearms History, Technology & Development Blog features a wide variety of posts on myriad subjects, from early black powder firearms to modern match rifles. The latest entry is a fascinating story on the Richardson R5 gun, an ultra-simple shotgun modeled on home-made, slam-fire weapons used by Filipino guerrilla forces. (David Richardson was a PT-boat officer who fought with resistance forces in the Philippines for three years. Hollywood made a movie based on his wartime activities in the Philippines.)
Richardson R5 Philippine Guerrilla Gun
On the Firearms History Blog, you’ll find tons of information on gun design, barrel-making, action types, and firearms testing equipment. To access hundreds of articles, click on the Firearm History Blog Archive Menu on the left side.
Sisk Rifles had been granted U.S. patent # 8,720,099 for a “Multi-Axis Adjustable Buttstock”*. Several other patents are still pending. In the meantime, gunsmith/inventor Charlie Sisk is continuing to develop more applications for his modular, adaptive stock. The complete Tactical Adaptive Rifle (STAR®) rifle stock is now available for short or long action, left or right hand Remington 700s (and clones) for $1395. Complete rifles are available for $6495, built to order. Demos for law enforcement are available on request. To learn more about this stock and other innovative Sisk products, visit Siskguns.com.
Click Photo for full-screen version:
Charlie Sisk SISK RIFLES
400 County Road 2340
Dayton, TX 77535
(936) 258-4984
Email: charlie [at] siskguns.com
*The patent is set to issue May 13, 2014, so it may not yet appear in patent databases.
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The 2014 Eastern CMP Games and Creedmoor Cup Matches are underway at Camp Butner, NC. This popular event, held May 2-11, offers a wide variety of shooting competitions, including: Rimfire Sporter Match, M16 Match, M1 Garand Match, Springfield Match, M1-Carbine Match, Vintage Military Match, Modern Military Match, Vintage Sniper Match, Pistol Matches and more. The Eastern CMP Games kicked off Friday, May 2nd. Set for the next two days are the Garand/Springfield/Vintage & Modern Military Match (two days), Carbine Match (Monday), and Vintage Sniper Team Match (Tuesday). The Creedmoor Cup Matches segment commences on May 7th with a Highpower Clinic and 4-man Team Match.
We recently wrote about a spectacular 2.6872″ ten-shot group shot at 1000 yards in Montana. Well Australian Peter Varley recently turned in another amazing group at 1000 yards — this time 2.010″ for FIVE shots. And he did it with a borrowed gun! That’s not the smallest 1K group ever shot on the planet*, but it’s still an Australian and (we believe) a Southern Hemisphere record. Varley shot the 2.010″ group with a borrowed 17-lb Light Gun at a Canberra Rifle Club match in March of this year. Congrats to Peter for his outstanding shooting. And “hats off” to fellow Queenslander John McQuire, who loaned Peter the rifle.
Shown below is Peter Varley with his target, plus a close-up. You’ll note that two of the five (5) shots go through a paster. You’ll find pasters all over these targets because the Canberra Club “recycles” these large 1K targets many times.
Peter reports: This was shot at a 1000-yard match on the Canberra Rifle Range on Sunday, March 9, 2014. I traveled 1300 kilometers (807 miles) from Nambour (Sunshine Coast) Queensland to Canberra in the Australian Capital Territory.
I had left my rifle case keys at the motel and resigned myself to target butts duty or a lazy day. A friend, John McQuire from Mackay (Central Queensland Coast) said: “Get my 6.5 x 47 out, clean up, and you’re in the first detail (relay)”. So it was a borrowed gun for the shoot. The match commenced around 9:00 am. Conditions were very good — winds were very light with no mirage to speak of. Everything fell into place.”
Gun Specifications: Lawton 7500 action with Jewell trigger, PacNor barrel chambered for 6.5×47 Lapua, home-made custom stock, March 10-60x scope
6.5x47L Load: Lapua 123gr Scenars, with CCI 450 primers and Varget (ADI 2208) powder.
*The current NBRSA Light Gun 1000 Yard 5-shot group record is 1.473″ by Bill Schrader in 2002. Tom Sarver is credited with an even smaller 5-shot IBS Light Gun record.
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Berger Twist-Rate Stability Calculator
On the Berger Bullets website you’ll find a handy Twist-Rate Stability Calculator that predicts your gyroscopic stability factor (SG) based on mulitiple variables: velocity, bullet length, bullet weight, barrel twist rate, ambient temperature, and altitude. This very cool tool tells you if your chosen bullet will really stabilize in your barrel.
LIVE DEMO BELOW — Just enter values in the data boxes and click “Calculate SG”.
How to Use Berger’s Twist Rate Calculator
Using the Twist Rate Calculater is simple. Just enter the bullet DIAMETER (e.g. .264), bullet WEIGHT (in grains), and bullet overall LENGTH (in inches). On its website, Berger conveniently provides this info for all its bullet types. For other brands, we suggest you weigh three examples of your chosen bullet, and also measure the length on three samples. Then use the average weight and length of the three. To calculate bullet stability, simply enter your bullet data (along with observed Muzzle Velocity, outside Temperature, and Altitude) and click “Calculate SG”. Try different twist rate numbers (and recalculate) until you get an SG value of 1.4 (or higher).
Gyroscopic Stability (SG) and Twist Rate
Berger’s Twist Rate Calculator provides a predicted stability value called “SG” (for “Gyroscopic Stability”). This indicates the Gyroscopic Stability applied to the bullet by spin. This number is derived from the basic equation: SG = (rigidity of the spinning mass)/(overturning aerodynamic torque).
If you have an SG under 1.0, your bullet is predicted not to stabilize. If you have between 1.0 and 1.1 SG, your bullet may or may not stabilize. If you have an SG greater than 1.1, your bullet should stabilize under optimal conditions, but stabilization might not be adequate when temperature, altitude, or other variables are less-than-optimal. That’s why Berger normally recommends at least 1.5 SG to get out of the “Marginal Stability” zone.
In his book Applied Ballistics For Long-Range Shooting, Bryan Litz (Berger Ballistician) recommends at least a 1.4 SG rating when selecting a barrel twist for a particular bullet. This gives you a safety margin for shooting under various conditions, such as higher or lower altitudes or temperatures. Try changing the altitude and temperature in the calculator and you will see that the SG can increase or decrease when these environmental factors change. Under optimal circumstances you should aim for a 1.4, that way if you change circumstances you are still over 1.1.
Erik Dahlberg rifling illustration courtesy FireArmsID.com.
Story idea from EdLongrange. We welcome reader submissions.
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TEST RESULTS
Team Smith & Wesson shooter 
USAMU Service Rifle shooter/instructor SSG Brandon Green set a new national record this past week, shooting a 500-33X in the individual Aggregate, National Match Course (NMC) with metallic sights. Green was near-perfect in the 200-yard Rapids, shooting an amazing 100-9X. Green was shooting a Tubb 2000 bolt-action rifle chambered in 6XC. He set the new record using Norma factory ammo. Yep, this was factory 6XC ammo, right out of the box.
If you have an SG under 1.0, your bullet is predicted not to stabilize. If you have between 1.0 and 1.1 SG, your bullet may or may not stabilize. If you have an SG greater than 1.1, your bullet should stabilize under optimal conditions, but stabilization might not be adequate when temperature, altitude, or other variables are less-than-optimal. That’s why Berger normally recommends at least 1.5 SG to get out of the “Marginal Stability” zone.
