Barney M. Auston of Tulsa, OK with rifle he built to break NBRSA record and win $250 cash award from Sierra Bullets. (From cover of Precision Shooting magazine. May 1956).
Way back in 1955 Sierra Bullets offered a $1000 prize for anyone setting a new Aggregate benchrest record with a 6mm (or larger) bullet. At the time the .222 Remington ruled the roost, and Sierra wanted to promote the larger caliber. (NOTE: That was serious money in 1955 — the equivalent of $10,187 in current dollars corrected for inflation). Sierra also offered a $250.00 prize for a record-breaking performance with any size caliber (including the .22s). Here is the story of how a Tulsa shooter claimed the $250.00 award with a world-record-setting Aggregate involving 10-shot groups at 100 and 200 yards.
Barney Auston’s record-setting rifle was built on an FN Mauser action with double set trigger, with a Hart stainless steel barrel, 30″ x 1 1/8″, chambered for the .222 Remington cartridge. The stock, made by Auston, has a hydraulic bedder as made by L. F. Landwehr of Jefferson City, MO. The scope is a 24X, 2″ inch Unertl. Mr. Auston shot 50gr bullets, custom made by W. M. Brown of Augusta, Ohio, with .705″ Sierra cups and soft swedged. His powder charge was 21 grains of 4198. The rifle rests, both front and rear, were also made by Auston.
Record-Setting Performance
On August 20, 1955, shooting at night in a registered shoot on the John Zink range near Tulsa, Oklahoma, Barney M. Auston of Tulsa broke the existing National Match Course aggregate record. As the first person to do that in 1955, Auston won the Sierra Bullets $250 cash award. Here is the original Sierra Bullets prize offer from 1955:
10-Shot Groups at 100 and 200
Mr. Auston’s winning Aggregate for the National Match Course (five 10-shot groups at 100 yards and five 10-shot groups at 200 yards) was .4512 MOA. He also broke the 200-yard aggregate with an average of .4624 MOA, beating the .4801 match MOA record set by L.E. Wilson only a month earlier.
Barney Auston was a custom rifle maker in Tulsa who fabricated the rifles used by many of the leading benchrest competitors in the Mid-Continent and Guild Coast Regions. Auston was himself one of the top benchrest shooters in those regions during his shooting career.
Editor’s Note: Both of Mr. Auston’s records were broken before the end of the 1955 shooting season, but Auston was the first to win the Sierra Prize. Interestingly, in setting his record, Austin broke the existing Agg record by L.E. Wilson of Cashmere, Washington — yes, the same L.E. Wilson that now makes dies.
In this .308 Win test, 70° F ammo shot 96 FPS slower than ammo heated to 130.5° F. And the 130.5° ammunition was 145 fps faster than ammo taken right out of the freezer (at 25.5° F). That’s a huge difference…
Today is the first day of August. That means most parts of the country will soon be encountering peak summer heat. Some ranges in the Western states have already recorded temperatures well over 100 degrees F during matches. When dealing with extreme summer heat, you should make a serious effort to keep your ammo at reasonable temperatures. When possible, keep ammo in a cooler in the shade.
Never leave boxes of ammo out in the hot sun. Even with powders advertised as “temp stable” you can see significant velocity increases when ambient temps reach 90 degrees and above. This article explains how temperature extremes (both hot and cold) can alter bullet velocities. The velocity differences between very cold ammo and very hot ammo can be very large, as this article explains.
EDITOR’s NOTE: The Sierra tester does not reveal the brand of powder tested here. Some powders are much more temp sensitive than others. Accordingly, you cannot extrapolate test results from one propellant to another. Nonetheless, it is interesting to see the actual recorded velocity shift with ammo temperature variations in a .308 Win.
Written by Sierra Chief Ballistician Tommy Todd This story originally appeared in theSierra Bullets Blog
A few weeks ago I was attending the Missouri State F-Class Match. This was a two-day event during the summer and temperatures were hot one day and hotter the next. I shot next to a gentleman who was relatively new to the sport. He was shooting a basically factory rifle and was enjoying himself with the exception that his scores were not as good as he hoped they would be and he was experiencing pressure issues with his ammunition. I noticed that he was having to force the bolt open on a couple of rounds. During a break, I visited with him and offered a couple of suggestions which helped his situation somewhat and he was able to finish the match without major issues.
He was shooting factory ammunition, which is normally loaded to upper levels of allowable pressures. While this ammunition showed no problems during “normal” testing, it was definitely showing issues during a 20-round string of fire in the temperatures we were competing in. My first suggestion was that he keep his ammunition out of the direct sun and shade it as much as possible. My second suggestion was to not close the bolt on a cartridge until he was ready to fire. He had his ammo in the direct sunlight and was chambering a round while waiting on the target to be pulled and scored which can take from a few seconds to almost a minute sometimes.
This time frame allowed the bullet and powder to absorb chamber [heat] and build pressure/velocity above normal conditions. Making my recommended changes lowered the pressures enough for the rifle and cartridge to function normally.
Testing Effects of Ammunition Temperature on Velocity and POI
After thinking about this situation, I decided to perform a test in the Sierra Bullets underground range to see what temperature changes will do to a rifle/cartridge combination. I acquired thirty consecutive .30 caliber 175 grain MatchKing bullets #2275 right off one of our bullet assembly presses and loaded them into .308 Winchester ammunition. I utilized an unnamed powder manufacturer’s product that is appropriate for the .308 Winchester cartridge. This load is not at the maximum for this cartridge, but it gives consistent velocities and accuracy for testing.
I took ten of the cartridges and placed them in a freezer to condition.
I set ten of them on my loading bench, and since it was cool and cloudy the day I performed this test I utilized a floodlight and stand to simulate ammunition being heated in the sun.
I kept track of the temperatures of the three ammunition samples with a non-contact laser thermometer.
The rifle was fired at room temperature (70 degrees) with all three sets of ammunition. I fired this test at 200 yards out of a return-to-battery machine rest. The aiming point was a leveled line drawn on a sheet of paper. I fired one group with the scope aimed at the line and then moved the aiming point across the paper from left to right for the subsequent groups.
NOTE that the velocity increased as the temperature of the ammunition did.
The ammunition from the freezer shot at 2451 fps.
The room temperature ammunition shot at 2500 fps.
The heated ammunition shot at 2596 fps.
The tune window of the particular rifle is fairly wide as is shown by the accuracy of the three pressure/velocity levels and good accuracy was achieved across the board. However, notice the point of impact shift with the third group? There is enough shift at 200 yards to cause a miss if you were shooting a target or animal at longer ranges. While the pressure and velocities changed this load was far enough from maximum that perceived over pressure issues such as flattened primer, ejector marks on the case head, or sticky extraction did not appear. If you load to maximum and then subject your ammunition to this test your results will probably be magnified in comparison.
This test showed that pressures, velocities, and point-of-impact can be affected by temperatures of your ammunition at the time of firing. It’s really not a bad idea to test in the conditions that you plan on utilizing the ammo/firearm in if at all possible. It wouldn’t be a bad idea to also test to see what condition changes do to your particular gun and ammunition combination so that you can make allowances as needed. Any personal testing along these lines should be done with caution as some powder and cartridge combination could become unsafe with relatively small changes in conditions.
At the request of our readers, we provide select “Deals of the Week”. Every Sunday afternoon or Monday morning we offer our Best Bargain selections. Here are some of the best deals on firearms, hardware, reloading components, optics, and shooting accessories. Be aware that sale prices are subject to change, and once clearance inventory is sold, it’s gone for good. You snooze you lose.
1. Midsouth — Sierra MatchKing Bullets in Stock
⏺ Excellent .224, 7mm, and .308 Match Bullets IN STOCK now
2. Sportsman’s WHSE — Savage 64 FV-SR with FDE stock, $189.99
⏺ Reliable with surprising accuracy for such an inexpensive rifle
Would you like to campaign a sub-$200 rifle and beat guys with rimfire rigs costing TEN times as much? That’s actually possible in the NRL22 game with the budget-priced Savage Model 64 SV-SR. This comes with a threaded, 16.5″ button-rifled heavy barrel that offers suprisingly good accuracy. The rifle comes with a one-piece Picatinny scope rail. The muzzle is threaded to accept brakes and suppressors. This can both be a great first rifle for a junior shooter as well as a fun tactical comp rig for an adult. NOTE: Most Savage 64 FV-SRs have black stocks, but these Sportsman’s Warehouse rigs have tan (Flat Dark Earth) stocks.
⏺ Excellent FFP MOA-value Scope for Varminting or PRS/NRL
Are you into PRS/NRL, or just looking for a FFP scope for target shooting and varminting. Then here’s a killer deal. Right now you can save $600.00 (50%) on an excellent first focal plane 4.5-27x50mm Bushnell scope with a great reticle. Price is now just $549.99 with FREE shipping from MidwayUSA. The Bushnell Forge Rifle Scope boasts side parallax, locking zero stop, and high contrast lenses. Click values are 1/4 MOA. We really like the Deploy MOA reticle which has the “Christmas” tree wind-hold marks. Also if you prefer a Second Focal Plane optic, Palmetto State Armory has the Bushnell Forge 3-24x56mm SFP scope on sale for $499.00.
4. MidwayUSA — Texas Star AR500 Steel Target, $239.99
⏺ Cool Large Spinner Target like those used in Major Steel Tactical Matches
Here’s a great new product for fun, reactive shooting with pistols, rifles and shotguns. Birchwood Casey’s Texas Star Target is a rifle-rated mechanical target. Sturdily built, this target features FIVE 6″-diameter AR500 steel plates. The 4 foot high target will rotate (swing) when the plates are hit. The target moves on 2 industrial greaseable bearings. The target comes powder coated black on all metal components. The target breaks down for easy transport.
5. Midsouth — Fiocchi 9mm 115gr FMJ Ammo 50rds, $27.99
⏺ Good 9mm pistol ammo at a decent price (finally!)
Finally we are starting to see popular ammo coming down in price. This quality Fiocchi 115gr 9mm ammo is $27.99 for 50rds at Midsouth. That works out to $0.56 per round. Grab this while you can. If the Fiocchi sells out at Midsouth, Palmetto State Armory has 100-round boxes of Armscor 9mm ammo for $59.99. That’s 60 cents per round — still a lot better than you’ll find at most vendors.
6. Amazon — Stack-On Security Cabinet, $142.00
⏺ Additional Secure Storage to complement heavy Gun Safe
This Stack-on Steel Security Cabinet holds 8 rifles or shotguns up to 52 inch tall. Includes a removable steel shelf. Foam padded bottom and barrel rests, plust removable steel Shelf. NOTE, this arrives in a flat box and must be assembled, but that’s pretty easy. The unit includes pre-drilled mounting holes in the bottom and back to allow attachment to floor or wall. The 3-Point locking system has a a double-bitted, key coded lock. Adjustable shelves are included. NOTE: This is NOT a heavy, thick-walled gun safe. But it can provide security in a work room or RV.
7. Midsouth — Lyman Tac-Mat Shooting Mat, $55.33.
⏺ Thick padded mat offers better comfort
Comfort counts when you’re on the ground for hours. We like this Lyman Tac-Mat 71″ x 36″ shooting mat. It has more padding than most mats on the market, providing better comfort. This is a good deal. This same Lyman shooting mat is $87.64 on Amazon.
8. Creedmoor Sports — Radians Ear Muffs on Sale
⏺ Comfortable Radians Muffs, choose basic or electronic
Creedmoor Sports has been running a sale on all Radians products, including ear protection. You can get the basic, low profile NRR 21 Lowset Muffs for just $13.45 or upgrade to the NRR 23 R3200 Dual-Mic Electronic Muffs for $32.25. Electronic muffs allow you to hear range commands better. NOTE: If you want something even more advanced, check out the Radians R3700 Quad Mic Muffs with Bluetooth. With these you can receive phone calls or listen to music.
⏺ Quality name-brand shooting eyewear — buy multiples at this price
Every shooter needs eye protection EVERY TIME you go to the shooting range. Right now Midsouth has the good Radians clear Lens Outback Shooting Glasses for just $5.88. These ANSI Z87.1 Radians Shooting Glasses provide 99.99.9% UVA/UVB protection with the coated lenses. These offer excellent wrap-around protection and are fairly light and comfortable. A handy neck cord is included. With this low $5.88 price, you can buy 3 or 4 sets and keep spares in your vehicles, so you always have protective eyewear for yourself and your friends.
10. Amazon — SnapSafe In-Wall Safe $209.99
Most readers probably have a nice big safe for long guns and other bulky items. But it would be nice to have a hidden secondary safe that fits in a wall. This SnapSafe In-Wall Safe can hold cash, valuables, passports, and a handgun or two. This In-Wall Safe fits between two wall studs. It sits flush, so it can easily be hidden by artwork. There is even a special “false bottom” that provides a secret hiding spot for cash, keys, and credit cards. On sale for $209.99 on Amazon, this in-wall safe is offered to Sportsman’s Guide Buyer’s Club Members for $189.99, a $20 savings.
by Sierra Bullets Ballistic Technician Paul Box
All of us who have been in reloading and shooting for any period of time have read how sectional density has been regarded as a bullet’s ability to penetrate. Back before high velocity came along and modern bullet design, the easiest way to get more “power” and penetration was by increasing the diameter and mass. After all, a bowling ball will hurt more than a golf ball, right?
Let’s take a closer look at sectional density.
The formula for calculating sectional density is pretty simple and straight forward. Take the bullet weight and divide by 7000. This number is then divided by the bullet diameter squared. Two bullets of equal weight and the same diameter will have equal sectional sectional density. No regard is given to the bullet construction. This is where the fly hits the soup in considering sectional density as far as penetration is concerned.
Section Density Formula: (Bullet Weight divided by 7000) divided by Bullet Diameter squared.
Bullet construction is the biggest factor in how it is able to penetrate. The best example I can think of here is to look at the Sierra .224 55 Gr. FMJBT GameKing #1355 compared to the 55 Gr. BlitzKing #1455. Both are .224 and weigh 55 grs. Both have a sectional density of .157. But there is a huge difference in their construction. The FMJ has a thick jacket and is designed to penetrate. The BlitzKing is designed for fast and rapid expansion with little concern for how deep they will penetrate.
The next time you’re choosing a bullet, look at the construction and less at the sectional density number. It’s all about the construction anyway. If you have any questions or would like to discuss sectional density or bullet penetration further, please give us a call at 800-223-8799 or shoot us an email at sierra@sierrabullets.com.
Here’s something you don’t see every day — a reloading press that has loaded over 1,000,000 rounds of ammo. At the NRA Convention in Dallas in 2018, Redding showcased an old Redding T-7 Turret Press delivered to Sierra Bullets decades ago. 0ne of the very first T-7s made by Redding, this “old warrior” was used by Sierra Bullets to load over 1,000,000 rounds of ammunition in Sierra’s ballistics lab.
Redding T-7 Still Within Spec
After all that loading, Redding tested the press and, remarkably, found that it still remained “within spec”. Redding notes: “This press was subjected to real world reloading wear and stress yet remains within ‘new’ spec after this historic test”. When showcased in Dallas, this Redding turret press was fitted with indicators to show “just how good American steel and craftsmanship remains after what, in a normal situation, would represent numerous lifetimes of use.”
About Redding Reloading
Redding Reloading Equipment has crafted quality, American-made products for the precision handloading market since 1946. Along with single-stage and turret presses, Redding makes great dies. And Redding’s line of tools/accessories includes concentricity gauges, scales, trimmers, powder measures, powder tricklers, cleaning tools, deburring tools, bushings, and many other quality items.
by Sierra Bullets Ballistic Technician Philip Mahin for Sierra Bullets Blog
A lot of calls that come into the Sierra Customer Service Center are made by shooters [of retirement age]. Most of the time the shooter used to reload back when they were [younger] and stopped in order to raise a family, pursue a career, or both. Maybe their father or grandfather taught them back in the day and they are looking for an answer to the new whatchamacallit they found on the internet. The point is they are coming back to it because it was fun.
Reloading Can Provide Stress Relief
As a father of three, a husband, a brother, a son and son-in-law, and a friend and neighbor, I get pulled in a lot of directions. In all honesty, reloading and shooting has become a stress relief for me even though I work in the shooting industry.
Sometimes, the shooting gets put on hold for other more important things but there will always be another project or repair to accomplish. There are a lot out there that have found a way to balance the work life, the family life, and the play life. I would like to applaud you on your efforts because it is a hard thing to accomplish.
Remember to take time and relieve that stress. Do something fun, especially if it is shooting that special hand-load you just made.
AccurateShooter Comment — Hand-Loading and the Creative Process
Reloading your own precise ammo can be rewarding in many ways. First it allows you a temporary escape from work pressures, “Honey-Dos”, filing your taxes — whatever. It’s just you and Mr. Rockchucker spending quality time in the loading room. Second, hand-loading is a creative process that engages the mind. During load development, you are like an inventor, selecting a powder charge, choosing the bushing size, experimenting with seating depths, working to perfect your load.
Lastly, the process of hand-loading is rewarding because you are building something start to finish. You begin with components — bullets, brass, and powder, and end up with a finished product that (hopefully) is better than the best factory ammo you could buy. It is enormously satisfying to start with piles of bullets and brass and end up with beautiful hand-loads that can deliver great accuracy.
Sierra Bullets has released very complete load data for the popular 6.5 Creedmoor cartridge. This medium-sized cartridge has become one of the most popular chamberings for tactical and PRS shooters. The 6.5 Creedmoor combines excellent accuracy, good mag-feeding, good barrel life, moderate recoil, and reasonable component cost. That’s why this cartridge has caught on quickly.
Developed in 2007 by Dennis DeMille and Dave Emary, the 6.5 Creedmoor is a shortened and improved 30 TC cartridge case that was inspired by the .308 Winchester design. This short action design was created to maximize case capacity and a wide range of loading lengths, while still fitting in standard short action magazines. With the correct twist barrel, the versatile 6.5 Creedmoor can take advantage of the wide range of bullet weights available in 6.5 mm (i.e. .264 caliber). Reloaders should keep in mind that the 6.5 Creedmoor works best with medium to medium-slow powders such as H4350, Varget, Win 760, and RE-17. The light recoil and adaptability of the efficient 6.5 Creedmoor cartridge has already proven itself in high power, precision rifle series and benchrest competitions. Couple that with respectable barrel life and its intrinsic accuracy potential and you have a recipe for success which should insure its legacy for decades to come.
Here are three tables from the Sierra Bullets Reloading Manual (5th Edition). IMPORTANT — This is just a sample!! Sierra has load data for many other 6.5mm bullet types, including FB, Spitzer, SBT, HPBT, and Tipped MK from 85 grains to 142 grains. To view ALL 6.5 Creedmoor DATA, CLICK HERE.
INDICATES MAXIMUM LOAD – USE CAUTION
LOADS LESS THAN MINIMUM CHARGES SHOWN ARE NOT RECOMMENDED.
INDICATES MAXIMUM LOAD – USE CAUTION
LOADS LESS THAN MINIMUM CHARGES SHOWN ARE NOT RECOMMENDED.
INDICATES MAXIMUM LOAD – USE CAUTION
LOADS LESS THAN MINIMUM CHARGES SHOWN ARE NOT RECOMMENDED.
Two More Great 6.5 Creedmoor Reloading Resouces
Want More 6.5 Creedmoor Load Info? View Starline’s 6.5 Creedmoor Guide by Gavin Gear:
PRB 6mm Creedmoor and 6.5 Creedmoor Load Survey
The Precision Rifle Blog compiled Load Data from PRS Competitors, for both 6mm Creedmoor and 6.5 Creedmoor. This is a good place to start. PRB surveyed the match loads for “173 of the top-ranked precision rifle shooters in the country”. CLICK HERE.
At the request of our readers, we provide select “Deals of the Week”. Every Sunday afternoon or Monday morning we offer our Best Bargain selections. Here are some of the best deals on firearms, hardware, reloading components, optics, and shooting accessories. Be aware that sale prices are subject to change, and once clearance inventory is sold, it’s gone for good. You snooze you lose.
⏺ Great price for nice hunting rifle; many calibers, coated action + barrel
In today’s market, getting a quality hunting rig for under $450.00 is a very good deal. Add in a Permacote protective finish on both action and barrel and you have a true bargain. Right now Sportsman’s Warehouse is offering the Winchester XPR rifle in a variety of regular and magnum chamberings for just $449.99. Choose from 6.5 Creedmoor, .270 Win, 7mm Rem Magnum, .308 Win, .30-06 Springfield, .300 Win Magnum. These guns have smooth feeding and good warranties. Notable features include:
Flat Dark Earth (FDE) Permacote Receiver Finish
Free-floating Button-rifled Barrel with FDE Permacote Finish
M.O.A. Trigger System with 2-Position Thumb Safety
Mossy Oak Elements Terra Bayou Camouflage Finish
2. Midsouth — Bullets IN STOCK from All Major Brands
⏺ Berger, Sierra, Hornady, Nosler, Barnes, Speer in stock
Reloading components are getting harder to find. Thankfully, Midsouth has a HUGE inventory of rifle bullets IN STOCK, from many makers, in a wide selection of calibers and weights. And many of these bullets are on sale right now. Choose your favorite projectiles from Berger, Sierra, Hornady, Nosler, Speer, and Barnes. You’ll find good prices on rifle match bullets as well as hunting bullets, with both tipped and conventional designs, as well as solids (from Barnes). Hornady A-Tips are on sale. CLICK HERE for Bullets.
⏺ Very high quality brass for popular mid-size accuracy cartridges
After Lapua and Peterson, USA-based Alpha Munitions makes some of the best cartridge brass available today. In stock now at Precision Reloading is Alpha brass for these popular cartridges: 6mm Creedmoor, 6.5 Creedmoor, 6XC, and .308 Win. Notably, Alpha also makes 6mm Dasher brass, saving you a fire-forming step, and Alpha also produces the new 6GT case popular with PRS shooters. BIG NEWS: Alpha recently started producing 6mm BRA (6BR Ackley) brass. Alpha 6mm BRA and 6 Dasher brass are available directly from Alpha Munitions, but act soon — this will quickly sell out. Click links below:
⏺ Fast, programmable, accurate dispenser at great price
The Frankford Arsenal Intellidropper is a high-quality powder scale dispenser. It’s accurate to +/- one-tenth of a grain, dispenses in seconds, and can be controlled by a handy mobile App that can store various charges weights for different cartridges. This unit has a 7000-grain capacity with both Auto and manual trickle capability. IMPORTANT: This super-low Amazon price won’t last long. Act quickly to secure the Intellidropper for $179.95 on Sale.
5. All Dealers — Zeiss Conquest V4 $100 Instant Rebate
⏺ Instant $100 savings on outstanding Zeiss Conquest V4 Scopes
Calling all holiday shoppers! Looking for that perfect gift for the hunter or shooter on your list? Through December 31, 2020, ZEISS is offering a great deal through participating ZEISS authorized retailers. Customers looking to buy Conquest V4 riflescopes and Terra ED 42 mm objective binoculars will receive $100 off instantly at time of purchase. No Rebate forms to fill out, no waiting periods — you just save $100 instantly. CLICK HERE for ZEISS SALE INFO.
6. MidwayUSA — BOG Death Grip Tripod, $124.99
⏺ Versatile — use in all positions (even prone), secure top clamp
BOG makes very popular “long reach” shooting sticks/bipods for hunters. And now BOG has developed a clamp-style tripod that is great for hunters and PRS/NRL competitors. The BOG Death Grip Tripod has a rectangular-style padded clamp that will fit a wide variety of rifle fore-end styles (and widths).
Watch the video above to see this tripod’s versatility and why it has earned rave reviews. Non-marring rubber jaw insert protect your rifle’s finish. The 3-position leg angle lock allows for secure shooting in standing, kneeling and prone positions. Tilt adjustment lever controls up to 25 degrees of cant forwards and back and the head pans 360 degrees. Right now the BOG Death Grip Tripod Aluminum version is on sale at MidwayUSA for $124.99, $25.00 off. NOTE: You need to place the product in MidwayUSA’s shopping cart to see this special price.
7. Focus Camera — Fujinon Scope Plus Binoculars, $149.00
⏺ Killer combo deal — great gift for someone getting started in hunting
Here is a killer deal on a hunting optics combo. Fujinon does make high quality optics but the company is not well known among American consumers so Fujinon optics have been deeply discounted. Right now you can get a good, light-weight 1.75-5x32mm hunting scope AND 10x32mm binoculars for just $149.00! The original MSRP on this combo was $499.99 so you’re saving over $350! The magnification level is ideal for a deer rifle scope. We think this would be a great gift item for a hunter in your family.
8. Midsouth — Great End-of-Year Target Sale
⏺ Dozens of Hi-Viz and Specialty Targets at Great Prices
Need targets for your range days next year? Midsouth Shooters has a huge selection of shooting targets at attractive prices. Choose from stick-on targets, target dots, splatter targets, grid targets, bullseye targets, and even Zombie fun targets, in various sizes and colors.
Midsouth also has a unique stick-on white benchrest target that comes on a handy roll. The 250 target roll is $12.49. This self-adhesive target is great for practicing for benchrest matches and load development. We use it because it has a nice grid and precise aim point.
9. MidwayUSA — Dual Gong Target System, 50% Off, $44.99
⏺ Great Price for twin AR500 system — just add wood beam and have fun
Who doesn’t like shooting steel? The “clang” of hitting a steel target at long range provides instant gratification. This Viking Solutions Gong Target System features two AR500 Steel Gongs (6″ and 8″) suspended by chains. All the hardware is supplied including chains, leg stands, and nuts and bolts — all you need is a length of 2×4 lumber. Setup time is less than two minutes. The gongs are manufactured from 3/8″-thick AR500 steel for long lasting durability! NOTE: User must supply lumber beam. This unit once sold for $89.99 so you save $45.00!
10. Amazon — Cleaning Kit with 1000 Patches, Swabs, Boresnake
⏺ Great bargain cleaning kit with swabs, 1000 patches, bottles and boresnake
This handy Gun Cleaning Kit is worth the $15.95 price for the 1000 cotton patches alone. But in addition to that you get a handy boresnake for barrel cleaning, 100 cotton, tipped swabs, two empty solvent bottles (needle-nose), along with a handy kit to carry all this gear. Buyer selects the boresnake size. Chose from: .223, .270/7mm, .308, .40, .45, and 12 gauge.
Sierra Bullets has published load data for the 6mm Creedmoor cartridge, a necked-down version of the popular 6.5 Creedmoor. Sierra has released very comprehensive 6mm Creedmoor load data, covering fifteen (15) different bullets from 55 to 110 grains. NOTE: Hornady-brand brass was used for Sierra’s 6mm Creedmoor load tests, not the newer, stronger Lapua 6.5 CM brass with small primer pockets. Hand-loaders using Lapua 6.5 Creedmoor brass necked to 6mm may have to adjust their loads.
Sierra writes: “As soon as the 6.5 Creedmoor was released in 2007, a 6mm version was being envisioned. After the 6mm Creedmoor demonstrated its worth at 1000 yards it began to catch the attention of Precision Rifle Series (PRS) competitors. The 6mm Creedmoor is a great fit for those looking for an AR platform-friendly cartridge. It delivers velocities very similar to the .243 Win and yet fits the AR10 magazine length[.] The 30-degree shoulder makes this a very efficient case and helps prolong case life as well. The 6mm Creedmoor works well with powders such as H4350, [RE-16], RE-17, and Ramshot Hunter for heavier long-range bullet weights. Slightly faster powders such as RE-15, Win 760, and Vihtavuori N540 work well with lighter weight bullets.”
Sierra Bullets Tested for 6mm Creedmoor Load Data
55gr BlitzKing (#1502)
60gr HP (#1500)
70gr HPBT (#1505)
70gr BlitzKing (#1507)
75gr HP (#1510)
In developing its 6mm Creedmoor load data, Sierra tested a very wide selection of propellants, two dozen overall. For the smaller bullets, fast-burning powders such as Benchmark, H4895, and CFE223 were tested. For the heavier 100+ grain bullets, Sierra tested a selection of medium-burn-rate powders including H4350, Reloder 16, Reloder 17, Varget, and Superformance. Sierra did a very thorough job. We know this information will be welcomed by 6mm Creedmoor shooters.
Don’t know what powder to try first? For the 107-110 grain bullets, if you want best accuracy and low ES/SD, our Forum members recommend Alliant Reloder 16 and Hodgdon H4350. If you are seeking max velocity with the 110-grainer, look at Hodgdon Superformance and Reloder 19.
Here are Sierra’s 6mm Creedmoor Load Data Charts for 90-95 grain bullets plus the 107gr MK and 110gr MK. There are five other tables for other bullet types.
BONUS: PRB 6mm Creedmoor and 6.5 Creedmoor Load Survey
The Precision Rifle Blog compiled Load Data from PRS Competitors, for both 6mm Creedmoor and 6.5 Creedmoor. This is a good place to start. PRB surveyed the match loads for “173 of the top-ranked precision rifle shooters in the country”. One cautionary note: These PRS guys may be loading fairly hot, so work up gradually, 0.3 grains at a time. CLICK HERE.
Written by Sierra Bullets Ballistic Technician Duane Siercks
One of the first things new reloaders notice is that load data varies between reloading manuals. The Sierra Bullets Technicians frequently get inquiries asking us to explain why the load data appears to be inconsistent. This article explains five key factors that can influence published load data.
Example of load data variances for two 168 grain bullets:
Here are five reasons why the load data varies:
The Bullet
Basically, the similarities in the .30 caliber 168 grain Match bullets (for example) end with weight and diameter. The bullets likely have dimensional differences such as bearing surface length. Bearing surface has a large effect on pressure and velocity. There are also differences in boat tail, flat base, ogive and over-all lengths, which each help determine the cartridge over-all-length (COAL). With different COAL’s, we can expect changes in pressure and velocity also. In some calibers there are differences in bullet diameter with different bullet manufacturers.
It is also worth noting that bullet manufacturers do not all use the same copper alloy for their jackets. This produces more or less friction that results in load pressures and velocities. The solid copper bullets also vary quite a bit in comparison to a lead core and copper jacketed bullet.
The Gun
Each gun is unique, even if you are using the same make, model, and caliber. Special consideration should be used to consider that not all firearm chambers are the same either, creating more variables that need consideration. There can be drastic differences in the throat length. This controls the amount of “jump” that a bullet experiences when the cartridge is fired.
The Powder
Within normal manufacturing tolerances, you can see some variation in a given powders burn rate between different lots of the same powder. So naturally when two different Manuals are produced, it would be doubtful that the same lots would be tested.
The Cartridge Cases
New cases are almost always near minimum specs in dimension. A load fired in a new case would likely have slightly more pressure that when fired in a re-sized case. This would certainly be true if we were loading into fire-formed cases that have had minimal re-sizing done. Fired cases that are full length resized most of the time be slightly larger than the new unfired cases. This gives you differences in case capacity. The same powder charge placed within a new case and a full length resized case will produce different pressure levels and probably different velocities.
Conditions
Temperature can cause pressure increases or decreases. Hot temperatures tend to cause pressures to increase, while cold temperatures will usually do the opposite. Humidity and altitude can impact pressures and velocities likewise.
Conclusion
As you can see, an amazing number of variables effect any load combination. With the differences in the manuals, you’re just seeing firsthand examples of what took place when the data was collected with that particular set of components and firearm. Think of a reloading manual as a report. In essence, a reloading manual says, “We tried this particular component combination, and these are the results we obtained.”
Remember that you may or may not reach the same maximum load safely. There is no “one load fits all bullets.” The minimum load data offers a safe place to start. The maximum load data listed should always be regarded as a safety guideline and not necessarily a goal! Your gun should shoot accurately without breaching the maximum load data. The best advice is: always start low and work your load up!
If you have questions about variances in load data or other reloading questions, please call our ballistic technicians at 1-800-223-8799 or send us an email at sierra [at] sierrabullets.com.
Today is the first day of August. That means most parts of the country will soon be encountering peak summer heat. Some ranges in the Western states have already recorded temperatures well over 100 degrees F during matches. When dealing with extreme summer heat, you should make a serious effort to keep your ammo at reasonable temperatures. When possible, keep ammo in a cooler in the shade.
Redding T-7 Still Within Spec
Developed in 2007 by Dennis DeMille and Dave Emary, the 6.5 Creedmoor is a shortened and improved 30 TC cartridge case that was inspired by the .308 Winchester design. This short action design was created to maximize case capacity and a wide range of loading lengths, while still fitting in standard short action magazines. With the correct twist barrel, the versatile 6.5 Creedmoor can take advantage of the wide range of bullet weights available in 6.5 mm (i.e. .264 caliber). Reloaders should keep in mind that the 6.5 Creedmoor works best with medium to medium-slow powders such as H4350, Varget, Win 760, and RE-17. The light recoil and adaptability of the efficient 6.5 Creedmoor cartridge has already proven itself in high power, precision rifle series and benchrest competitions. Couple that with respectable barrel life and its intrinsic accuracy potential and you have a recipe for success which should insure its legacy for decades to come.
⏺ Dozens of Hi-Viz and Specialty Targets at Great Prices
