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May 4th, 2024

Saturday Movies: RCBS Tool Videos (Hodgdon Now Owns RCBS)

There was huge news in the reloading world this week. Hodgdon Powder Company (Hodgdon) has acquired RCBS from Revelyst, a division of of Vista Outdoor (VSTO). Most operations of RCBS will remain in Oroville, California for now, and the full product line will stay in production — presses, dies, powder measures, case prep tools, priming tools, scales and more. But this is still big news, with a leading reloading gear maker being acquired by a leading powder maker/distributor.

Today’s Saturday Showcase feature some of the most popular and noteworthy RCBS products including single-stage, turret, and progressive presses, plus powder dispensers and other tools.

RCBS ChargeMaster Link Scale/Dispenser with Bluetooth

Having a modern, electronic powder scale/dispenser makes the hand-loading process vastly more efficient. The latest generation of powder dispensers are very accurate, and they can store charge settings for multiple cartridge types. The latest RCBS ChargeMaster Link dispenser has a modern interface, plus Bluetooth technology that “talks” to a handy App on your mobile device. This is available now for $299.99 at Cabelas.com.

RCBS Combo Kit — Good Choice for Getting Started in Reloading

You can definitely save money by buying multiple reloading gear items in one combo package. RCBS offers a variety of Reloading Combo Kits which feature reloading press, powder measure, scale, priming tool, and other items. These range in price from $265-$620 on Amazon. This video reviews an RCBS Rebel Master Kit. This is a very complete starter set-up, sold for $499.99 at Midsouth.

Along with the press, we like many of the components in the Rebel Master combo kit. The powder measure works well as does the trickler, and the hand primer tool is reliable, with good feeding and plenty of leverage.

RCBS Partner Press

We think all serious reloaders should have a small, secondary single-stage press for repetitive tasks such as decapping primers. In addition, a small, compact press can be transported easily to the range. Load development can be done more efficiently when loading at the range, as you can easily modify seating depth and other variables. The RCBS Partner Press (#ad) is a great choice for a secondary press. This UltimateReloader video shows the key features of the Partner Press.

RCBS 6-Station Turret Press — Operation Tips

This editor has owned and used an RCBS Turret Press for over two decades. While certainly not as versatile/sophisticated as the Area 419 XERO turret press, this six-station RCBS press does its job handily. It is a good choice if you load multiple pistol cartridges. With six stations, you can install both a sizing and a seating die for three different cartridge types, such as 9mm Luger, .357 Magnum, and .45 ACP.

RCBS Brass Boss Case Prep Center

The RCBS Boss is a powered case prep center that performs multiple tasks efficiently. Priced at $198.99 on Amazon (#ad), the RCBS Boss boasts six variable, high-speed rotating stations (four at <350 RPM; two at <550 RPM). This unit is great for initial case prep (chamfering/deburring) and regular brass maintenance.

RCBS Summit — Set-UP and Field installation on Vehicle

The RCBS Summit Press (#ad) is a very unique, small footprint press that operates differently than most reloading presses. The cast-iron Summit has a large-diameter center column and die moves up and down to meet the cartridge. With this small footprint, the Summit can be used in the field. As you can see in the second video, one of our testers actually mounted a Summit Press on his vehicle (with a special pedestal) so he could load anywhere.

RCBS Bench-mount Priming Tool (Two Short Videos)

If you need to prime large numbers of cases, the RCBS bench-mount Auto Priming Tool can do so efficiently at a modest cost (currently $155.09 on Amazon #ad). It attaches to your bench so it is secure and stable. A vertical tube holds dozens of primers that feed into the pusher as you can see in these videos. Older guys who experience pain when gripping hand primer tools have praised this bench-mounted RCBS unit.

Choosing a Case Cleaning System

Here Kent Sakamoto of RCBS looks at the three main types of brass cleaning systems: Vibratory Tumbler, Wet Tumbler (with media), and Ultrasonic Cleaning Machine. Kent reviews the pros and cons of each system. Most gun owners can benefit by having an ultrasonic machine for parts cleaning as well as a tumbler for cleaning fired brass.

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Permalink - Videos, Gear Review, Reloading No Comments »

May 4th, 2024

How .308 Win Velocity Changes with Barrel Cut from 28″ to 16.5″

With barrels, one wonders “Can a little more length provide a meaningful velocity gain?” To answer that question, Rifleshooter.com performed an interesting test, cutting a .308 Win barrel from 28″ all the way down to 16.5″. The cuts were made in one-inch intervals with a rotary saw. At each cut length, velocity was measured with a Magnetospeed chronograph. To make the test even more interesting, four different types of .308 Win factory ammunition were chronographed at each barrel length.

This is a very useful test is you’re thinking about building a .308 Win hunting rifle, or perhaps thinking of going shorter for your F-TR rifle to save weight.

READ RifleShooter.com .308 Win Barrel Cut-Down Test Article.

Test Barrel Lost 22.7 FPS Per Inch (.308 Win Chambering)
How much velocity do you think was lost, on average, for each 1″ reduction in barrel length? The answer may surprise you. With a barrel reduction from 28″ to 16.5″, the average speed loss of the four types of .308 ammo was 261 fps total. That works out to an average loss of 22.7 fps per inch. This chart shows velocity changes for all four ammo varieties:

rifleshooter.com barrel .308 win cut-down test saw ammo GMM velocity magnetospeed

Summary of Findings:
The average velocity loss per inch, for all four ammo types combined, was 22.7 FPS. By ammo type, the average FPS loss per inch was: 24.6 (Win 147 FMJ), 22.8 (IMI 150 FMJ), 20.9 (Fed GMM 168gr), and 22.5 (Win 180PP).

Interestingly, these numbers jive pretty well with estimates found in reloading manuals. The testers observed: “The Berger Reloading manual says for the 308 Winchester, ‘muzzle velocity will increase (or decrease) by approximately 20 fps per inch from a standard 24″ barrel’.”

How the Test Was Done

The testers described their procedure as follows: “Ballistic data was gathered using a Magnetospeed barrel mounted ballistic chronograph. At each barrel length, the rifle was fired from a front rest with rear bags, with five rounds of each type of ammunition. Average velocity and standard deviation were logged for each round. Since we would be gathering data on 52 different barrel length and ammunition combinations and would not be crowning the barrel after each cut, we decided to eliminate gathering data on group sizes. Once data was gathered for each cartridge at a given barrel length, the rifle was cleared and the bolt was removed. The barrel was cut off using a cold saw. The test protocol was repeated for the next length. Temperature was 47° F.”

rifleshooter.com barrel .308 win cut-down test saw ammo GMM velocity magnetospeed

CLICK HERE to Read the Rifleshooter.com Test. This includes detailed charts with inch-by-inch velocity numbers, multiple line charts, and complete data sets for each type of ammo. Rifleshooter.com also offers ballistics graphs showing trajectories with different barrel lengths. All in all, this was a very thorough test by the folks at RifleShooter.com.

Much Different Results with 6mmBR and a Longer Barrel
The results from Rifleshooter.com’s .308 barrel cut-down test are quite different than the results we recorded some years ago with a barrel chambered for the 6mmBR cartridge. When we cut our 6mmBR barrel down from 33″ to 28″, we only lost about 8 FPS per inch. Obviously this is a different cartridge type, but also our 6mmBR barrel start length was 5″ longer than Rifleshooter.com’s .308 Win start length (and we ended where Rifleshooter’s .308 started — at 28″). Velocity loss can be more extreme with shorter barrel lengths (and bigger cartridges). Powder burn rates can also make a difference.

Permalink Gear Review, Gunsmithing, Tech Tip No Comments »

May 4th, 2024

Safety Tip: Adjust Loads Conservatively with Coated Bullets

Moly Danzac Bullet Coating Anti-friction HBN

Coating bullets with a friction-reducing compound such as Molybdenum Disulfide (Moly) offers potential benefits, including reduced barrel heat, and being able to shoot longer strings of fire between bore cleanings. One of the effects of reduced friction can be the lessening of internal barrel pressures. This, in turn, means that coated bullets MAY run slower than naked bullets (with charges held equal).

To restore velocities, shooters running coated bullets are inclined to “bump up” the load — but you need to be cautious.

Be Careful When Increasing Loads for Coated Bullets
We caution shooters that when your start out with coated bullets in a “fresh barrel” you should NOT immediately raise the charge weight. It may take a couple dozen coated rounds before the anti-friction coating is distributed through the bore, and you really start to see the reduced pressures. Some guys will automatically add a grain or so to recommended “naked” bullet charge weights when they shoot coated bullets. That’s a risky undertaking.

moly coated bullets friction chronograph

We recommend that you use “naked” bullet loads for the first dozen coated rounds through a new barrel. Use a chronograph and monitor velocities. It may take up to 30 rounds before you see a reduction in velocity of 30-50 fps that indicates that your anti-friction coating is fully effective.

We have a friend who was recently testing moly-coated 6mm bullets in a 6-6.5×47. Moly had not been used in the barrel before. Our friend had added a grain to his “naked” bullet load, thinking that would compensate for the predicted lower pressures. What he found instead was that his loads were WAY too hot initially. It took 30+ moly-coated rounds through the bore before he saw his velocities drop — a sign that the pressure had lowered due to the moly. For the rounds fired before that point his pressures were too high, and he ended up tossing some expensive Lapua brass into the trash because the primer pockets had expanded excessively.

LESSON: Start low, even with coated bullets. Don’t increase your charge weights (over naked bullet loads) until you have clear evidence of lower pressure and reduced velocity.

danzac moly coated coat bullets

Procedure After Barrel Cleaning
If you shoot Moly, and clean the barrel aggressively after a match, you may want to shoot a dozen coated “foulers” before starting your record string. Robert Whitley, who has used Moly in some of his rifles, tells us he liked to have 10-15 coated rounds through the bore before commencing record fire. In a “squeaky-clean” bore, you won’t get the full “benefits” of moly immediately.

To learn more about the properties of dry lubricants for bullets, read our Guide to Coating Bullets. This covers the three most popular bullet coatings: Molybdenum Disulfide (Moly), Tungsten Disulfide (WS2 or ‘Danzac’), and Hexagonal Boron Nitride (HBN). The article discusses the pros and cons of the different bullet coatings and offers step-by-step, illustrated instructions on how to coat your bullets using a tumbler.

Permalink Bullets, Brass, Ammo, Reloading No Comments »

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Saturday Movies: RCBS Tool Videos (Hodgdon Now Owns RCBS)

RCBS ChargeMaster Link Scale/Dispenser with Bluetooth

RCBS Combo Kit — Good Choice for Getting Started in Reloading

RCBS Partner Press

RCBS 6-Station Turret Press — Operation Tips

RCBS Brass Boss Case Prep Center

RCBS Summit — Set-UP and Field installation on Vehicle

RCBS Bench-mount Priming Tool (Two Short Videos)

Choosing a Case Cleaning System

How .308 Win Velocity Changes with Barrel Cut from 28″ to 16.5″

How the Test Was Done

Safety Tip: Adjust Loads Conservatively with Coated Bullets

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