We first ran this story a few years back. But it’s still a very interesting subject for benchrest shooters. Shown above, the 30 BR (a 6mmBR necked up to .30 caliber) currently rules the benchrest-for-score game. However, a 30 BR Improved offers some potential advantages, particularly when the winds are strong or tricky. In this article Al Nyhus explains his 30 BRX wildcat. Running Hodgdon H4198, Al says he gets an easy 150 – 200 FPS more than the conventional 30 BR. That can translate to less drift in the wind. It also lets you pursue a higher speed node, which can lead to improved accuracy with some barrels.
Forum member Al Nyhus is a top-level score shooter who has competed successfully with the 30 BR cartridge in VFS (Varmint for Score) matches. Al has been working on an “improved” 30 BR cartridge that delivers extra velocity. Al’s 30 BRX cartridge is inspired by the 6mm BRX cartridge, popular in 600-yard benchrest and across-the-course competition. The 6mm BRX cartridge maintains the same sidewall profile and shoulder angle as the parent 6mmBR case. Likewise, the 30 BRX retains the 30° shoulder used on the popular 30 BR cartridge.
Al reports: “Thought you might like to see what I’ll be working with in my VFS gun this season. It’s a true 30 BRX — a 30 BR with the shoulder moved forward 0.100″ with the standard BR shoulder angle. Stan Ware of SGR Custom Rifles built one last season for Steve Grosvenor and I was really impressed by the performance of Steve’s gun. The 30 BR barrel on my VFS gun needed replacing, so the new 30 BRX got the nod.”
30 BRX Delivers 150-200 FPS More Velocity than 30 BR
Al says his 30 BRX gives a solid 150-200 fps speed gain over the 30 BR at the top, while needing just 2.5-3.0 more grains of Hodgdon H4198 to do so. A 30 BR case holds on average 40.8 grains of water, while the 30 BRX holds 42.3 grains (roughly 4% more). So the 30 BRX delivers a 7% increase in velocity with a mere 4% increase in H20 capacity. That’s pretty good efficiency. [Editor’s Note: Assuming 34 grains of H4198 is a typical 30 BR match load, Al’s increase of 2.5-3.0 grains for the 30 BRX represents roughly a 7.5-8.5% increase in actual powder burned. That explains the higher velocities.]
Why did Nyhus decide to try an “improved” 30 BR?
Al explains: “The 30 BRX was created to operate at a [higher] velocity level than can be achieved with the standard 30 BR case, while at the same time keeping the easy-tuning characteristics of the standard 30 BR case. We also wanted to use the same powders currently used with the 30 BR and maintain similar operating pressures.” Is the 30BRX harder to shoot because of the increased velocity? Al doesn’t think so: “In a 13.5-lb HV gun, the 30 BRX case is a pleasure to shoot with just a flea bite of recoil.”
Will the 30 BRX Become Popular in Score Competition?
The 30 BR is already an exceptionally accurate cartridge that dominates short-range Benchrest for Score competition. Will the 30 BRX make the standard 30 BR obsolete? Nyhus doesn’t think so. However, Al believes the 30 BRX offers a small but important edge in some situations: “On any given day, it’s the shooter that hits the flags best and makes the fewest mistakes that ends up on top. No amount of velocity will save you when you press the trigger at the wrong time. Missing a switch or angle change at 200 yards that results in 3/4″ of bullet displacement on the target can’t be compensated for with another 200 fps. That’s the hard fact of benchrest shooting. But on those days when, as Randy Robinett says, ‘our brains are working’, the BRX may offer enough of an advantage to turn a close-but-no-cigar 10 into an ‘X’ at 200 yards. Or turn a just-over-the-line 9 into a beggar 10.” Given the fierce competition in Score matches, an extra 10 or another X can make the difference between a podium finish and also-ran status.
Need a simple, easy-to-use drop chart for your rifle? Something you can tape right to the buttstock? Then check out Hornady’s handy Online Ballistics Calculator. This user-friendly calculator will compute your drops accurately, and output a handy “Cheat Sheet” you can print and attach to your rifle.
Here’s how it works. From the Ballistics Calculator Page, first select 4DOF or Standard. Next input G1 or G7 BC values, muzzle velocity, bullet weight, zero range, and a few other variables.
Click “Calculate” to view the full chart (shown below). Then click “View Cheatsheet” and the simpler, 4-line Drop Chart (shown above) appears. Click “Print” and you’re done!
Choose Basic Table or Advanced Version with More Variables
The online ballistics caculator is easy to use. You can select the basic version, or an advanced version with more data fields for environmental variables (altitude, temperature, air pressure, and humidity). You can also get wind drift numbers by inputing wind speed and wind angle.
Conveniently, on the trajectory output, come-ups are listed in both MOA and Mils — so this will work with either MOA clicks or Mil-based clicks. There are more sophisticated ballistics solvers available on the web, such as the outstanding Applied Ballistics Online Calculator, but the Hornady Calculator is very simple and easy to use. If you just want a basic drop chart, you may want to check this out.
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.
NOTE: All listed products are for sale to persons 18 years of age or older. No products are intended for use by minors.
1. Sportsman’s Warehouse — Great Hunt Sale, Save up to 50%
⏺ Save on hunting rifles, ammo, camo, packs, optics and more
Right now Sportsman’s Warehouse is running its annual Great Hunt Sale with major savings on a huge selection of products for hunters. You can save on rifles, optics, rangefinders, tripods, hunting clothing, backpacks, muffs, and quality ammo. If you need a good hunting rifle, check out the Weatherby Vanguard for $499.99, a $50 savings off the regular price. The Vanguard has a nice 2-stage trigger and is backed by Weatherby’s 3-shot 1 MOA accuracy guarantee. Choose among many popular chamberings including: 6.5 Creedmoor, 6.5 PRC, 7mm-08, 7mm Rem Mag, .308 Win, .300 Win Mag, and .30-06 Springfield.
2. EuroOptic — Fall 2024 Hunting Season Sale (Optics, Rifles)
⏺ Major savings on quality scopes, binocs, rangefinders, and accessories
EuroOptic.com is running a major Fall Hunting Products Sale. Among the many super deals are a 3-12x56mm Vortex illuminated reticle scope for just $239.99 ($180 off plus add’l 12% off with code VTX12), and a SIG Sauer combo package with 3-10x42mm scope and KILO2800 Laser Rangefinder. Get both items for just $399.99, a $250 savings. Along with these deals, many Leupold scopes and binoculars are deeply discounted, and some Swarovski optics products are as much as $500 off. Along with the optics deals, Tikka and Bergara rifles are on sale.
3. CDNN Sports — Winchester .22 LR Wildcat, $199.99
⏺ Fun rimfire rifle complete with optic — good owner reviews
Here’s a fun semi-auto .22 LR rifle at a crazy low price — $199.99 complete with a mounted Red Dot Reflex optic. That’s a steal for a reliable rimfire rig for plinking and NRL22 matches. The Winchester Wildcat takes Ruger 10/22 mags, and has some great features, such as field-removable lower receiver, ambidextrous controls, integral Picatinny rail, and rear barrel access. It has a good trigger and shoots well. In many respects the Wildcat beats the Ruger 10/22 while costing a lot less. If you don’t need the optic, you can get a basic Wildcat for $189.99 with Strata camo stock.
⏺ Good quality primers with Zero Hazmat and FREE Shipping
Right now Midsouth is offering FREE Shipping and FREE Hazmat with the purchase of Ginex primers. With this deal you can save up to $60 on your next primer purchase. These GINEX primers are sold in 5000-ct lots starting at just $349.99 for Small Rifle Primers and Small Pistol Primers. That’s just $0.07 per primer. And yes Large Rifle Primers are in stock at $499.99 for 5000, i.e. ten cents each.
5. CDNN Sports — Walther P22 Target, $248.98
⏺ Very good .22 LR Target/Training pistol with major discount
We think all shooters should have a quality .22 LR rimfire pistol with a good trigger, ergonomic grip, and excellent accuracy. With the Walther P22 Target Model, you can get all those things for just $248.98 at CDNN Sports, a great deal. The P22 Target pistol is a very nice rimfire handgun with a 5″ barrel plus a forward ported compensator. The ergonomic grip has interchangeable backstraps to better fit all size hands.
6. Palmetto SA, Blackhawk Shooting Mat/Rifle Case, $49.99
⏺ Multi-Function Shooting Mat/Rifle Case now $100 Off
Here’s a great deal on a multi-function Mat/carry case. The Blackhawk Stalker Drag Mat Carry Case functions as a nice padded shooting mat, AND it serves as a rifle carry case and drag bag. Length is 50.5″ and width (in rifle case mode) is 9″. This mat/case is made from durable 1000 denier nylon and closed-cell foam. It has carry straps plus a shoulder strap.
7. Precision Reloading — Big Savings on Redding Products
⏺ Discounts on dies, tools, and all Redding products
Need dies, reloading tools, or a precision press? Then head over to Precision Reloading which is running a major Redding Sale right now. You’ll 10% or More on Redding reloading dies and equipment, with some items discounted up to 42%. NOTE: This sale ends Friday, October 11th, so act quickly.
8. Scheels — RCBS Universal Priming Tool, $64.99
⏺ Recommended tool that adapts to multiple case rim sizes
The RCBS Universal Hand Primer tool can handle both large rim and small rim cases without any parts change. Leverage is good and the primer feeding tray is very reliable. This is a recommended tool for both beginning handloaders and expert-level reloaders. Another good feature of this tool is a patented safety gate that isolates the primer seating operation from the primer supply, lowering risk of tray detonation.
How many times have you grabbed your electronic earmuffs only to find the batteries are dead. To avoid the hassles (and cost) of battery replacement, consider Walker’s Rechargeable Razor Ear Muffs (#ad). These rechargeable muffs have an estimated 80 hours of run time. That’s enough to get through several DAYS at the range. Then you can recharge the muffs conveniently at home or in your vehicle. To hear range commands clearly, the muffs have HD speakers. Plus there’s a handy audio jack. These muffs are comfortable and boast a 21 dB Noise Reduction Rating (NRR).
10. Palmetto State Armory — AR15 Lower Receiver, $49.99
⏺ Amazing Deal on quality AR lower receiver
With the election just a month away, and Biden/Harris slamming through anti-gun executive orders, you want to get that AR15 build started while you still can. If you need an AR lower, here’s a great deal. Palmetto State Armory (PSA) now has stripped AR15 lowers for just $49.99. With this lower as the core, you can build up your AR for any discipline you choose: 3-Gun rifle, service rifle competition, varmint rifle, or even “race gun” for the PRS Gas Gun Series. These PSA lowers are forged using 7075-T6 Aluminum and have a durable, mil-spec anodized hardcoat finish.
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For years the 6mm PPC (aka 6PPC) cartridge has dominated short-range group benchrest shooting, winning championships and setting records. Traditionally 6PPC cases were formed from Lapua 220 Russian brass. Now there is an exciting alternative — Alpha Munitions 6mm PPC cartridge brass. With a suitable chamber this is ready to load and shoot with no special fire-forming required. (If you have a tight-necked chamber, neck-turning would be needed first.)
If you want to try the Alpha 6mm PPC brass, head over to Bruno Shooters Supply. Right now Bruno’s has a large quantity of Alpha 6mm PPC brass in stock and ready to ship. This brass comes in nice, protective plastic boxes with secure slots for each brass case. Order now at $159.95 for a 100ct box. NOTE: Discounts are offered for quantities of 500+.
On the Alpha Munitions website, you’ll find this information for Alpha 6mm PPC brass with Optimized Case Design OCD technology:
– 100 count boxes ship in custom Alpha Munitions plastic cases with perforated bi-layer foam for protection of cases and loaded ammunition
– Brass has a .060″ flash hole
– Do NOT small base size OCD brass
NOTE: If you shoot mid-range (600-yard) benchrest or F-Open matches, Alpha Munitions also produces 6mm BRA, 6mm Dasher, and 6mm GT brass. Unfortunately all three types are listed as currently out of stock on the Alpha Munitions website.
Before you load that nice new cartridge brass for the first time, run an expander mandrel down the case necks. This will iron out dents and provide more uniform neck tension. Chose a mandrel diameter that provides appropriate neck tension.
Lapua brass is so good that you’ll be tempted to just load and shoot, if you have a “no-turn” chamber. However, some minimal case prep will ensure more uniform neck tension. Keeping your neck tension very uniform allows more consistent bullet seating. That, in turn, usually yields better accuracy, and lower Extreme Spread and Standard Deviation (ES/SD). Lapua brass, particularly 6mmBR, 6.5×47, 6.5 Creedmoor, and .308 Win comes from the factory with tighter-than-optimal necks. Before you seat bullets, at a minimum, you should inside chamfer the case mouths, after running an expander mandrel down the necks. The expander mandrels from both Sinclair Int’l and K&M will both leave the necks with enough neck tension (more than .001″) so you can then seat bullets without another operation. We suggest putting a bit of lube on the mandrel before running it down the necks — but remove any lube that gets inside the necks before seating bullets.
Both Sinclair and K&M Tools make a die body specifically to hold expander mandrels. The Sinclair version, is shown above. This $45.99 unit fits caliber-specific expander mandrels ($10.99) which measure approximately .001″ less than bullet diameter for each caliber. This is an updated “Gen II” design that completely captures the mandrel within the die so the mandrel cannot pull out. It also has an O-ring in the die cap that allows the mandrel to self-center within the case neck. Brownells offers two sizes of Sinclair die bodies for expander mandrels: .17 -.338 Caliber (#749011715 $48.99); and .357 – .50 caliber (#749008843, $48.99). All Generation II dies are machined from stainless steel and the standard diameter 7/8-14 dies include the Sinclair Stainless Steel Split Lock Ring.
Once you run the Sinclair expander mandrel down the necks of Lapua brass, after you account for brass spring-back, you’ll have about .002″ neck tension*. This will make the process of seating bullets go much more smoothly, and you will also iron out any dents in the case mouths. Once the case mouths are all expanded, and uniformly round, then do your inside neck chamfering/deburring. The same expander mandrels can be used to “neck-up” smaller diameter brass, or prepare brass for neck-turning.
Forum member Mike Crawford adds: “These expanders can also reduce runout from offset seating. Prior to bullet seating, expand the sized necks to force thickness variance outward. With the Sinclair system, the necks will springback fine, and will not be pulled out of center. This leaves plenty of tension, and bullets seated more centered. I do this, even with turned necks, to get improved seating.”
Mandrels vs. Expander Balls on Decapping Rods
If you haven’t acquired an appropriate expander mandrel for your brass, but you DO have a full-length sizing die with an expander ball, this will also function to “iron out” the necks and reduce tension. However, using a die with an expander ball will work the necks more — since you first size them down, then the ball expands them up again. Typically (but not always), run-out is worse when using an expander ball vs. an expander mandrel.
* This .002″ tension is what we have observed with Lapua 6mmBR, 6.5×47, 6.5 Creedmoor, and .308 Win brass. This might vary with much smaller or larger cases, and of course a different brand of brass might yield different results. If you get too little tension with your current mandrel, you can get a smaller-diameter mandrel from 21st Century Innovation which offers stainless, Black Nitride, or Titanium nitride versions. The Nitride models have noticeably less friction.
“The overturning moment MW tends to rotate the bullet about an axis, which goes through the CG (center of gravity) and which is perpendicular to the plane of drag….
Ruprecht Nennstiel, a forensic ballistics expert from Wiesbaden, Germany, has authored a great resource about bullet behavior in flight. Nennstiel’s comprehensive article, How Do Bullets Fly, explains all the forces which affect bullet flight including gravity, wind, gyroscopic effects, aerodynamic drag, and lift. Nennstiel even explains the rather arcane Magnus Force and Coriolis Effect which come into play at long ranges. Nennstiel’s remarkable resource contains many useful illustrations plus new experimental observations of bullets fired from small arms, both at short and at long ranges.
Shadowgraph of .308 Winchester Bullet
A convenient index is provided so you can study each particular force in sequence. Writing with clear, precise prose, Nennstiel explains each key factor that affects external ballistics. For starters, we all know that bullets spin when launched from a rifled barrel. But Nennstiel explains in greater detail how this spinning creates gyroscopic stability:
“The overturning moment MW tends to rotate the bullet about an axis, which goes through the CG (center of gravity) and which is perpendicular to the plane of drag, the plane, formed by the velocity vector ‘v’ and the longitudinal axis of the bullet. In the absence of spin, the yaw angle ‘δ’ would grow and the bullet would tumble.
If the bullet has sufficient spin, saying if it rotates fast enough about its axis of form, the gyroscopic effect takes place: the bullet’s longitudinal axis moves into the direction of the overturning moment, perpendicular to the plane of drag. This axis shift however alters the plane of drag, which then rotates about the velocity vector. This movement is called precession or slow mode oscillation.”
Raise Your Ballistic IQ
Though comprehensible to the average reader with some grounding in basic physics, Nennstiel’s work is really the equivalent of a Ph.D thesis in external ballistics. You could easily spend hours reading (and re-reading) all the primary material as well as the detailed FAQ section. But we think it’s worth plowing into How Do Bullets Fly from start to finish. We suggest you bookmark the page for future reference. You can also download the complete article for future reference and offline reading.
Starline Brass offers a series of videos with helpful reloading tips. Focused primarily on pistol cartridges, these short videos can help anyone get started with metallic cartridge reloading. If you load pistol rounds on a progressive, this video series is particularly helpful. The on-camera host is Hunter Pilant, son of Carroll Pilant of Sierra Bullets.
Preventing Double Charges
Tip: Use a bulky powder that fills your case more than half way with a correct charge. This will overfill the case if it is double-charged, making it very difficult to seat a bullet.
Tumble New Brass Before Loading the First Time
Tip: Tumble new pistol cartridge brass in used media for 30 minutes before loading for the first time. This will add enough graphite (carbon residue) to smooth case entry into dies. You can also lube the case mouths with graphite, or use spray lube.
Powder Through Expander — How to Eliminate Hang-ups
Tip: When loading pistol brass with a progressive press, sometime the powder-through expander is hard to remove, especially with short cases. There are two fixes — first, try deburring the inside of the case mouth on your cases. Second, the radius of the powder through expander plug can be modified to smooth entry and exit (see photo). Starline will do this modification for free.
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.
NOTE: All listed products are for sale to persons 18 years of age or older. No products are intended for use by minors.
1. Creedmoor Sports — Berger Sale 6mm, 6.5mm, 7mm, .308
⏺ Top quality match and hunting bullets with major savings
Right now Creedmoor Sports is running a sale on popular, ultra-high-quality Berger Bullets. Currently a wide range of Berger Hybrid Target bullets are on sale in 6mm, 6.5mm, 7mm and .308 calibers. These bullets are a top choice for multiple competition disciplines including F-Class, 600-yard Benchrest, and PRS/NRL. NOTE: Along with the bullets on sale, Creedmoor has 6.5 Creedmoor Berger Hybrid Target ammunition on sale also.
2. CDNN Sports — Ruger American Gen II Rifle w/ Scope, $599.99
⏺ Great deal for American-made hunting rifle with Bushnell scope
Need a rifle for your fall hunt? Save up to $149 on this Ruger American Rifle combo at CDNN Sports. This gray-stocked rifle comes complete with a 4-12x40mm Bushnell hunting scope, and 20″ fluted barrel (with brake). Choose .204 Ruger, .223 Rem, .243 Win, .308 Winchester, or .450 BM chamberings. In addition, for the same $599.99 price, there are versions with FDE tan stock or green stock and 16.1″ or 16.4″ barrels offered in .223 Rem, 300 Blackout, and .450 BM. All these Ruger American Gen II rifles come with 4-12x40mm Bushnell scope and rings, adjustable trigger, and Cerakote metal finish.
3. EuroOptic — Athlon Scope Sale, Save up to 48%
⏺ Buyers rate these Athlon scopes as great for the price
Need a great scope at a big discount? Consider the very affordable yet excellent Athlon Optics riflescopes. Right now they are discounted up to 48% at EuroOptic.com. With a wide array of options you can pick up something for AR shooting, PRS/NRL, Benchrest competition, or Long-range hunting. Magnification choices run from 1-6X zoom in the Athlon Midas BTR compact scopes up to 4.5-30X in the Athlon Ares ETR series scopes with 34mm tubes. For a hunting rig, consider the Athlon Midas TAC 4-16x44mm DD SF — it’s now on sale for just $389.99, a 41% savings off the $662.42 regular price.
4. Midsouth — Lee Challenger Press with BONUS Die Set, $79.99
⏺ Good LEE Press on Sale with FREE DIES
The LEE Challenger is the world’s best-selling single station press. The latest Gen III Challenger features an ergonomic lever plus a convenient tube for spent primers. Right now, to mark its 40th Anniversary, LEE is offering a FREE die set with the purchase of the LEE Gen III Challenger Press. Choose one of four cartridge types: .223 Rem, 9mm Luger, .38 SPL/.357 Mag, and .45 ACP (.44 SPL/.44 Mag is also listed but is out of stock). Another good feature of the LEE Press is the Breech Lock Quick Change Die System — change dies instantly with a twist of the wrist.
5. Palmetto SA — S&W Optics-Ready 9mm M&P Shield, $701.99
⏺ Popular 9mm compact pistol with installed red dot sight
Smith & Wesson took the power and features of the full sized M&P pistols and put them into a slim, lightweight pistol — the M&P Shield 9mm. This is an easy-to-conceal 9x19mm slim pistol has a single-stack magazine and ships with a modern 4 MOA Red Dot sight installed on the slide. This pistol has a Armornite corrosion-resistant finish. Two magazines are included — one flush-fit and one with extended base. Overall this is a very good choice for a CCW handgun.
6. Amazon — Caldwell Deadshot Shooting Bag Combo, $27.80
⏺ Good, inexpensive set-up for sighting-in hunting rifles
If you need an inexpensive set of bags to zero your hunting rifle this fall, consider the Caldwell DeadShot Front and Rear Bag combo. The front bag can also be used in PRS/NRL matches for support. NOTE: Both front and rear bags come filled with corn cob media to allow for immediate use. These bags can be used on virtually any surface, and are stable on wood or concrete benches or rotating shooting stand
7. Amazon — Uikro Shooting Mat, $23.98
⏺ Large, well-padded, waterproof roll-up mat under $25
Having a good, comfortable and durable shooting mat is essential for prone shooting. You can spend over $140 on some mats, but a great, affordable option is the $24 Uikro folding mat. This has ample padding and features moisture-resistant 600D Oxford material for durability. This 1.8-lb shooting pad conveniently folds up to 7.9″L x 6.3″W x 2.7″H. With a portable handle, this mat is easy to transport and it can also be attached to a backpack.
8. Midsouth — 1000 rds CCI Blazer 115gr 9mm, $249.99
⏺ Very good, reliable and consistent 9mm pistol ammo
CCI makes very reliable pistol ammo with reloadable brass cases. Right now you can get 1000 rounds of CCI Blazer 9mm FMJ ammo for just $249.99 at Midsouth. That price works out to just $12.50 per 50-round box — a good price. This very affordable 115gr Blazer 9mm ammo is excellent for practice/training, and it is more reliable than commercial reloads.
9. Amazon — Wheeler Screwdriver Kit, $14.99
⏺ Handy kit with Standard, Hex, Phillips, and Torx Bits
Having the right tools is vital when working on guns. We recommend the Wheeler Space Saver Screwdriver Set with Magnetic Handle. This takes up little space on your bench, but contains a durable and comprehensive set of 26 bits of four types. Included with the standard, Phillips, Hex, and Torx bits, is a 2″ long #2 Phillips bit which is ideal for recoil pad installation, and a hex-to-square conversion bit which allows you to use 1/4″ square drive sockets and other attachments.
10. Amazon — MTM R-100 Ammo Box, $17.99 and up
⏺ Best 100-rd ammo box, securely holds cartridges nose up or nose down
For transporting ammo to the range, we like the MTM R-100 Deluxe ammo box (#ad). These durable R-100 flip-top ammo boxes provide excellent protection for your ammo. When rounds are in the nose-down position special fingers in each hole prevent bullets from hitting the bottom of the box, thereby preventing tip damage. On Amazon there are different prices for R-100 boxes for various cartridge types. Prices start at $17.99 for one R-100 box. There is also a choice between opaque green R-100 boxes and semi-transparent blue R-100 boxes. We like being able to see the cartridges inside the box with the blue design. The most popular blue box, for 22-250 to .30-06 cases, is currently $18.85 on Amazon. This works for all these cartridge types: 22-250, 6mm PPC, 6mmBR, 6 Dasher, .243/.270/.308 Win, 25-06, 6.5 Creedmoor, 6.5×55, 6.5-284, 7.62×39, 7mm-08 Rem, .30-06 Springfield and more.
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Here’s something you don’t see every day — the inside of loaded cartridges, sliced halfway through. This lets you see how bullet core, jacket, cartridge case, powder, and primer all fit together. Give credit to the folks at FOG Ammunition for creating this interesting series of cut-through ammo images. We show four cartridges here: the .308 Winchester, 9mm Luger, 300 BLK, and .50 BMG. You’ll find two more (the .223 Remington and .45 ACP) on the originalFOG Ammo Blog Article.
This .308 Winchester model took on a different approach by only cutting the brass case and displaying the full bullet, primer and powder load. A spec amount of powder was used to create the model powder form. An estimated 10% volume was added during the forming process, along with an undetermined amount of air pockets.
This bisection is a 9mm Luger Jacketed Hollow Point round with flake powder held together with super glue. After this self-defense round was cut by a trained professional the round was polished by hand. This might look like stick powder, but those are in fact flakes stacked up in cross-section. Designed in 1901 by Georg Luger, this popular cartridge is used by civilians, military, and law enforcement.
For this model of the .300 AAC Blackout (aka 300 BLK), a Dremel tool was used to create a pie cut within the bullet and brass case. A measured amount of power, roughly 65% of spec charge, was placed inside the case with super glue. This cartridge was originally optimized for subsonic use with a suppressor, so the amount of powder used is small relative to the nominal case capacity. That leaves more room for the relatively large .30-caliber bullet.
Last but definitely not least is the .50 Caliber BMG round (aka .50 Browning Machine Gun). Famed for its wartime use in the M2 Machine gun, the .50 BMG round is also used in civilian Long Range competitions. A typical .50 BMG cartridge holds over 225 grains of powder. That’s almost ten times the amount in a 5.56×45 NATO Round! To demonstrate the size of the .50 BMG, check out that .223 Rem for comparison.
Shown are funnel with ultra-long drop tube (which helps get more kernels in the cases), RCBS Chargemaster (in wood box), and Hood Press (similar to Harrell’s Combo press).
Loading at the range remains important in the Benchrest for Group discipline. In a Special Report below, past IBS President Jeff Stover explains how loading methods (and hardware) have evolved over the years. The advent of accurate, affordable electronic powder dispensers, such as the RCBS ChargeMaster and Frankford’s new Intellidropper, have changed the game and made it easier to load efficiently at the range. And quality manual powder measures are fast and can be very consistent, with a little practice. Loading at the range permits competitors to tune their load to the conditions, change seating depths, or even choose different bullets to suit the barrel’s preferences on any given day.
Although pre-loading is not uncommon, most 100/200-yard group shooters usually load at the match, often between relays. The goal is to shoot smaller groups by staying “in tune”. In a game where 5-shot groups “in the 1s and Zeros” is the goal, tuning loads for the conditions helps deliver match-winning accuracy. Nearly all competitors in this short-range discipline shoot the 6mm PPC cartridge, or a PPC variant.
Loading at the Range — Then and Now
In benchrest shooting for group, loading at the range has been de rigueur for decades. In the Score discipline, preloading is usually the custom. The main reason is that, in Score competition, only one Aggregate (warm-up match and five record targets) per day is usually shot. That would be less than 50 shots, assuming a few sighter shots. Also, the 30BR, the dominant Benchrest-for-Score cartridge, is very amenable to pre-loading.
By contrast, the Group discipline includes 21 targets (two warm-ups and twenty record targets) over a weekend, usually shot with 6PPC-chambered rifles. Many times, the 6PPC shooters may tweak their loads through the day given changing atmospheric conditions or simply trying to find the correct tune to “dot up”. This term, “Dot up”, means the shots are essentially going through the same hole, or closely so.
Loading at the range was a bit different when benchrest competition was in its infancy. The 1951 book, Modern Accuracy by Bob Wallack, is the best of the early benchrest books. Copies can be found, from time to time, on eBay or Alibris. It is a fascinating survey of benchrest as it existed more than six decades ago. There’s even coverage of a controversial target that was argued over at the time. In it, there is a photo of Wallack using the rear bumper of a car at the bench to clamp his reloading tools. Things have come a long way compared to the range loading set-ups of modern shooters. Here you can see Bob Wallack way back in 1950:
Modern loading bench set-ups shown in this Special Report belong to top shooters Howie Levy, Bob Hamister, and Kent Harshman.
Forum member Al Nyhus is a top-level score shooter who has competed successfully with the 30 BR cartridge in VFS (Varmint for Score) matches. Al has been working on an “improved” 30 BR cartridge that delivers extra velocity. Al’s 30 BRX cartridge is inspired by the 6mm BRX cartridge, popular in 600-yard benchrest and across-the-course competition. The 6mm BRX cartridge maintains the same sidewall profile and shoulder angle as the parent 6mmBR case. Likewise, the 30 BRX retains the 30° shoulder used on the popular 30 BR cartridge.
