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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Here is big news for reloaders. RCBS, one of the leading producers of dies, reloading gear, case prep tools, powder dispensers, and reloading presses, has been acquired by Hodgdon Powder Company. RCBS has been operated by Revelyst, a division of of Vista Outdoor (VSTO). (SEE Revelyst Report on Yahoo Finance.) Here is the text from the official press release announcing the acquisition:
Hodgdon Powder Company Acquires RCBS Reloading
May 02, 2024
Hodgdon Powder Company is pleased to announce the acquisition of RCBS Reloading from Revelyst, a segment of Vista Outdoor (NYSE: VSTO). This acquisition is effective May 2, 2024, with Hodgdon prepared to immediately continue shipping RCBS products to wholesale and retail customers.
“This acquisition of RCBS, the leading brand in metallic reloading tools, is a perfect complement to our portfolio of smokeless powder brands for our handloading customers,” said Steve Kehrwald, president and CEO of Hodgdon Powder Company. With our world-class ballistics labs, we look forward to providing even more load data to our new RCBS customers.”
Hodgdon is thrilled to add the RCBS facility in Oroville, CA to our company-owned facilities in Shawnee, KS, Herington, KS and Miles City, MT. The addition of the RCBS team will more than double the headcount at the Hodgdon Powder Company and greatly expands the company’s manufacturing capabilities.
“For years, our friends have referred to the Hodgdon family and company as ‘The Gunpowder People’ and this acquisition further demonstrates our dedication to the handloader,” said J.B. Hodgdon, co-owner with his late brother Bob, of the Hodgdon Powder Company. “Our dad Bruce partnered with Fred Huntington from RCBS to conduct Reloading Roadshow events in the 1950s and 1960s. I believe they both are looking down today, proud to have our two great brands together in 2024.”
Comment from Vista Outdoor/Revelyst
“For more than 80 years, RCBS has demonstrated their manufacturing, innovation and operational excellence,” Said Eric Nyman, Co-CEO of Vista Outdoor and CEO of Revelyst. “We are thrilled for RCBS and their new ownership with Hodgdon Powder. This transaction joins two iconic brands, and it ensures that RCBS is positioned for success in the next chapter of its history.”
Hodgdon sent a letter today to its customers. In the letter, Hodgdon Sales V.P. Shawn Kelley states: “Hodgon Powder Company announced earlier this morning that we acquired RCBS from Vista Outdoor, effective immediately.” Shown above is the letter sent to customers.
Every handloader can benefit from a turret press. This type of press features an upper rotating disk that has multiple threaded placements for dies or other tools (such as powder dispensers). There are a variety of turret presses on the market today with the remarkable Area 419 9-Station Zero Press at the top end, and the inexpensive Lee turret presses at the other end of the spectrum. In between are Lyman’s 8-station All-American turret, the Redding 7-station T-7 press, and the RCBS 6-station turret.
Today’s Saturday video showcase features notable turret presses from Area 419, Lyman, Redding, and RCBS. We lead off with a feature on the advanced Area 419 ZERO 9-station turret.
Area 419 ZERO 9-Station Turret Reloading Press — Without Peer
Area 419’s impressive ZERO reloading press is a 9-station turret press with some very unique features. This press was designed to be the most precise turret ever created. As tested by Gavin Gear of UltimateReloader.com, the ZERO turret press delivered very impressive shoulder-bump consistency and ultra-low seated bullet run-out (about +/- 0.0005″). The numbers were as good as you can get from a quality single-stage press, so Area 419 did some impressive engineering. We would expect that, as this represents a big investment — MSRP is $1275.00. SEE FULL REVIEW on UltimateReloader.com.
The ZERO turret press lets you install up to nine (9) different reloading dies in the large top turret, which revolves around a central axis. But unlike most turret presses, the ZERO doesn’t have flex or wobble when you’re loading. This is because Area 419 includes a clever system for locking the turret in position after you’ve selected the die from your array.
Lyman Brass Smith All-American 8-Station Turret Press
The 8-station Lyman Brass-Smith All-American Turret Press is an impressive product. Since its introduction in 2018, Lyman’s All-American 8 has become popular with handloaders. With a $227.50 street price at MidwayUSA, the 8-station Lyman is $148 cheaper than the $375.49 7-station Redding T-7 (current Amazon price). No question, that’s a significant price advantage, which has helped Lyman grab turret press sales from Redding.
More Stations Provide More Reloading Options
Gavin liked having 8 stations, because this offers more flexibility. With eight stations, you can have four two-die sets, or three two-die sets plus a dedicated decapping die and a powder measure. Gavin notes: “I’ve owned many reloading presses, including 3-station, 4-station, 5-station, and 7-station variants, but I’ve never owned an 8-station press until the Brass-Smith All-American 8 came to the shop. I’ll have to say… you can’t get too many stations, especially on a manually-indexed turret. I love the idea that you can leave dies on the press, and load multiple calibers/chamberings using the same turret setup.”
Redding T-7 Turret Press Overview
The Redding T-7 has long been a leading turret press for precision handloaders. It offers one more station than the other “green” turret press offered by RCBS. It has a reliable optional priming system and plenty of leverage. We like the build quality of the Redding T-7, but it is now significantly more expensive than the Lyman turret, which has one more station. See a comparison of the Redding T-7 and Lyman 8-station turret press in the next video.
8 vs. 7 Stations — Lyman Turret and Redding T-7 Comparison
If you’re considering acquiring a turret press, it helps to compare products side by side. Here is an interesting comparison video showcasing the Redding T-7 and the Lyman 8-station turret press. This video offers a side-by-side comparison of the Redding turret and the Lyman turret, showing how each performs key functions.
RCBS Six-Station Turret Press
This Editor has used an RCBS Turret Press for over 15 years. It does not have the most stations or the most sophisticated features, but it has proven very reliable over the years. I use it primarily to use with pistol sizing and seating dies. Having six stations allows me to load multiple cartridge types: 9x19mm, .357 Magnum, and .45 ACP. READ FULL REVIEW on UltimateReloader.com.
Creedmoor Enhanced Turret Heads for Redding, Lyman, RCBS
Creedmoor Sports offers enhanced precision press heads for the RCBS Turret Press, Lyman 8 Turret Press, and RCBS 6-Station Turret Press. The Creedmoor Enhanced Press Head is a direct drop-in upgrade to the factory OEM press head and can be installed in a matter of minutes. This press head is precision-crafted from stainless steel bar stock. Priced at $199.95, these enhanced heads are featured in the video below.
The $199.95 Creedmoor Sports turret top allows greater precision in case sizing and bullet seating. A recent UltimateReloader video covers the advantages of the new precision turret head for the Redding T-7. READ Full Report on UltimateReloader.com.
The Hornady Handbook of Cartridge Reloading is now available in App form. Like the print and eBook versions of the Reloading Handbook, the new Hornady Reloading Guide App provides comprehensive reloading information. It covers rifle cartridges from the 17 Hornet to the 50 BMG and handgun cartridges from the 22 Hornet to the 500 S&W. This is a convenient mobile App, that works with both iOS (Apple) and Android devices. There are versions for both smartphones and tablets (iPads and Android). With this App you can access load data at the range, making it easier to do efficient load development at the range.
Hornady Reloading App Features:
Velocity and powder charts
An impressive lineup of powders
Find reliable loads by cartridge and bullet weight
Information on bullet design and shooting application
Very comprehensive load data from .17 Cal up to .50 Cal
Download FREE APP — Apple and Android compatible
The Hornady Reloading App is FREE to download. The App includes more than 200 calibers with a variety of loads featuring Hornady bullets, such as the A-Tip Match, ELD-X, and ELD® Match line.
Subscription Options
The iOS and Android download pages explain that fees may be required for detailed information: “Derived from extensive testing by Hornady Manufacturing Company, this App includes reloading data for over 200 cartridges and 300 bullets. [Hornady reports] only data that proved safe in our research. Users have the ability to purchase data for individual cartridges, purchase the whole current edition of the handbook, or subscribe and receive the entire handbook plus more. Subscription provides access to all handbook data on your mobile device and real updates for all new data without waiting for the new handbook publication to be produced.”
Vihtavuori Powders, a leading choice of competitive target shooters and long-range hunters, returns as the title sponsor of the F-Class Points Series V2 Finale. The 2024 V2 Finale will be held May 23-26, 2024 and at the Bayou Rifles Juliff Range in Rosharan, Texas.
“We’re thrilled to extend our partnership with Vihtavuori for the 2024 V2 Finale event! As one of our original sponsors, their direct support has been instrumental in bringing this event to life and supporting its growth, commented Tod Hendricks, F-Class Point Series member. “Now serving as the lead sponsor, Vihtavuori’ s continued generosity ensures that events like ours can flourish, offering fresh and exhilarating experiences in the competitive shooting sports arena.”
The F-Class Points Series is a yearlong F-Class points system and leaderboard, that culminates in the V2 Finale, which pits F-Class competitors against each other in a bracket-style double elimination match. Sixty-four competitors, 32 for each class (F-Open and FT/R), are invited to the Finale based on their series ranking. Since the V2’s inaugural series in 2021, partnerships have begun in Canada, South Africa, Italy, and Australia. The 2024 Finale will be held May 23-26 at Bayou Rifles in Rosharon, TX.
CLICK HERE for V2 Finale and F-Class Points Series rules. For more information on the F-Class Points Series and V2 Finale, visit FClassPointSeries.com.
This new-format match pits F-Class competitors against each other in a bracket-style double elimination match. The elite field (32 per class) is selected via a preceding Points series. In the past targets were placed at 1000 yards. In something unusual for an American F-Class match, in the V2 Finale all shooting will be done via PAIR FIRING, with shooters going head-to-head with alternating shots. The listed course of fire for 2024 is:
3.1. 2 CONVERTIBLE SIGHTERS AND 15 SHOTS FOR RECORD AT 1000 YARDS, PAIR FIRE
3.2. 2 CONVERTIBLE SIGHTERS AND 10 SHOTS FOR RECORD AT 1000 YARDS, PAIR FIRE
3.3. 5 SHOTS FOR RECORD AT 1000 YARDS, PAIR FIRE
Photo 1: Three Near-Equal-Weight 7mm Bullets with Different Shapes
TECH TIP: Bullets of the same weight (and caliber) can generate very different pressure levels due to variances in Bearing Surface Length (BSL).
This article, from the USAMU Facebook Page, concerns reloading safety. In the relentless quest for more speed and flatter ballistics, some hand-loaders load way too hot, running charges that exceed safe pressure levels. Hint: If you need a mallet to open your bolt, chances are your load is too hot. Stay within safe margins — your equipment will last longer, and you won’t risk an injury caused by over-pressure. In this article, the USAMU explains that you need to account for bullet shape, diameter, and bearing surface when working up a load. Don’t assume that a load which is safe for one bullet will be safe for another even if both bullets are exactly the same weight.
How Bullet Profile and Bearing Surface Affect Pressure Levels
Today, we continue our handloading safety theme, focusing on not inadvertently exceeding the boundaries of known, safe data. Bullet manufacturers’ loading manuals often display three, four, or more similar-weight bullets grouped together with one set of load recipes. The manufacturer has tested these bullets and developed safe data for that group. However, seeing data in this format can tempt loaders — especially new ones — to think that ALL bullets of a given weight and caliber can interchangeably use the same load data. Actually, not so much.
However, bullet designs include many variables such as different bearing surface lengths, hardness, and even slight variations in diameter. In fact, diameters can occasionally range up to 0.001″ by design. Thus, choosing untested bullets of the same weight and caliber, and using them with data not developed for them can yield excess pressures.
This is only one of the countless reasons not to begin at or very near the highest pressure loads during load development. Always begin at the starting load and look for pressure signs as one increases powder charges.
Bullet Bearing Surface and Pressure
Bullet bearing surface length (BSL) is often overlooked when considering maximum safe powder charges and pressures. In Photo 1, note the differences in the bullets’ appearance. All three are 7 mm, and their maximum weight difference is just five grains. Yet, the traditional round nose, flat base design on the left appears to have much more BSL than the sleeker match bullets. All things being equal, based on appearance, the RN/FB bullet seems likely to reach maximum pressure with significantly less powder than the other two designs.
TECH TIP: Bullets of the same weight (and caliber) can generate very different pressure levels due to variances in Bearing Surface Length (BSL).
Bullet 1 (L-R), the RN/FB, has a very slight taper and only reaches its full diameter (0.284 inch) very near the cannelure. This taper is often seen on similar bullets; it helps reduce pressures with good accuracy. The calculated BSL of Bullet 1 was ~0.324″. The BSL of Bullet 2, in the center, was ~0.430″, and Bullet 3’s was ~ 0.463″. Obviously, bullets can be visually deceiving as to BSL!
Some might be tempted to use a bullet ogive comparator (or two) to measure bullets’ true BSL for comparison’s sake. Unfortunately, comparators don’t typically measure maximum bullet diameter and this approach can be deluding.
Note: Due to time constraints, the writer used an approximate, direct measurement approach to assess the bullets’ different BSLs. While fairly repeatable, the results were far from ballistics engineer-grade. Still, they are adequate for this example.
Photo 2: The Perils of Measuring Bearing Surface Length with Comparators
In Photo 2, two 7mm comparators have been installed on a dial caliper in an attempt to measure BSL. Using this approach, the BSLs differed sharply from the original [measurements]. The comparator-measured Bullet 1 BSL was 0.694” vs. 0.324” (original), Bullet 2 was 0.601” (comparator) vs. 0.430” (original), and Bullet 3 (shown in Photo 2) was 0.602” (comparator) vs. 0.463” (original). [Editor’s comment — Note the very large difference for Bullet 1, masking the fact that the true full diameter on this bullet starts very far back. You can use comparators on calipers, but be aware that this method may give you deceptive reading — we’ve seen variances just by reversing the comparators on the calipers, because the comparators, typically, are not perfectly round, nor are they machined to precision tolerances.]
Thanks to the U.S. Army Marksmanship Unit for allowing the reprint of this article.
Product innovation is all about “building a better mousetrap”, or in this case, building a better bore-cleaning patch. A real smart guy, Shane Smith, has invented a triangular patch that earned a patent. The U.S. Patent Office has awarded a utility patent for BoreSmith’s triangular Pyramid Patch™. This unique cleaning patch was designed by Shane Smith, a mathematician/physicist who employed his scientific and firearms knowledge to create innovative bore-cleaning products.
BoreSmith’s clever Triangle Patch™ (aka Pyramid Patch) presents more cleaning surface area to the bore wall than does a conventional square or round patch (of equivalent size). At the same time, the unique geometry makes Triangle Patches much less likely to jam in the barrel. This is because the notches in the sides of the triangle allow the patch to sit more uniformly on the jag (without bunching up). In addition, the Pyramid patch is must less likely to jam due to pleating. One reason conventional patches get stuck is unwanted 5-layer pleating. The special notches in the Pyramid patch remove all or most 5-layer pleating. As a result the patch does not bunch up and this also reduces rod bowing.
Triangle Patch Function and Geometry Explained (See 1:18 time-mark):
NOTE: Despite what you may see in this video, you should ALWAYS insert brushes and patches from the chamber end first, using a fitted cleaning rod bore guide. With bolt-action rifles, NEVER insert a cleaning rod (with brush or jag) in through the muzzle. This may damage the delicate crown of your barrel.
Even with the very best cartridge brass, you can achieve the most consistent neck-wall thickness with precision case-neck turning. This can be done slowly with hand-tools (such as a K&M Tool), but powered neck turning can produce superb results in a fraction of the time. For today’s Saturday Showcase we feature the excellent 21st Century Power Neck-Turning Lathe and the state-of-the-art AUTODOD machine from F-Class Products. In addition, we show how neck turning can be done using a vertical milling machine fitted with a neck-turner. And to start off, we offer a Keith Glasscock video that analyzes when it makes sense to turn necks, considering the demands of your particular shooting disciplines.
To Turn or NOT to Turn — Wisdom from Keith Glasscock
In this video, top F-Class Shooter and Wind Coach Keith Glasscock discusses the process of turning case necks. Neck-turning may be mandatory if you have a chamber with reduced-diameter neck dimensions. With a standard chamber you may still want to do a minimal neck-turn to make your brass more consistent or to increase clearance. On the other hand, high-quality brass, such as Lapua, may perform exceptionally well right out of the box. Keith explains how to determine whether you need to turn your brass for your discipline, and explains procedures that help you achieve great results.
21st Century Innovation Powered Neck-Turning Lathe
The 21st Century Innovation Power Neck-Turning Lathe is a superb system for quickly and precisely uniforming the neckwall thickness of cartridge brass. With this powered system you can turn necks faster and more efficiently, with less effort. The cases feed very smoothly and the results are beautiful. Power is activated by the red button on the end of the blue, horizontal feed handle
The Powered Neck-Turning Lathe is a modular system. Swing the bar from right to left to feed the case. The power head (with case holder) glides on stainless steel rails for smooth movement. This allows very precise feed rate. Power is supplied via a button that is built into the end of the feed handle. Push the red button to make the case spin. It’s as simple as that. NOTE: The 21st Century Power Neck-Turning Lathe has been updated — the frame and motor are now flat black in color.
Here is another video that shows how the lathe system operates:
AUTODOD Power Neck-Turner from Black Machine
Bryan Blake of F-Class Products has created an ultra-precise and speedy neck-turning machine, the AUTODOD. This employs twin precision cutter tips to turn case necks inside and out quickly and efficiently, with superior precision. The advanced AUTODOD Neck Turning Machine holds cases securely in a precision-machined spindle attached to an electric motor. Twin blades move precisely during the cutting process, milling the necks inside and out. The turned necks come out perfect every time, with the shoulders trimmed exactly (with doughnut removed) as well. If you turn hundreds of cases during a shooting season, you may want to consider getting an AUTODOD from F-Class Products. Below is a video from F-Class John Showing the AUTODOD Machine in action.
Neck-Turning Cases with a Milling Machine
Our friend Erik Cortina figured out how to turn his match cartridge case-necks using his milling machine. Erik told us: “While in Raton [a while back], Mid Tompkins told me that he turns his brass on milling machine. He said he could do about 500 in two hours, so I decided to try it.” Erik fitted a Don Nielson “Pumpkin” neck-turner to the mill, and he used a modified 21st Century case holder to secure the brass. As you can see from this video, Erik was very successful with the process. The tool spins at 1500 rpm, turning Lapua 6.5-284 cases that have been necked up to 7mm.
It’s hard to argue with Erik’s results. Here are his turned Lapua cases, which have neck-wall thickness consistent to two ten-thousandths of an inch.
Neck-Turning Lubricants for Turner Mandrels
For Neck-Turning, Try STP Blend or Assembly Lube
For hand neck-turning, a variety of lubricants can work well on the outside of the necks. You will also want to lube the mandrel which runs inside the case. There are many options for lubing the neck-turning tool mandrel while turning case necks. Some folks use a blend of STP® Oil Treatment and Mobil 1 lube. Chuckw2 reports: “Try STP and Mobile 1 Synthetic oil in a 50/50 mixture. Very slick, you will need to tumble your cases after turning.” STP is a very thick lubricant, that flows and clings almost like honey. Jason reports the STP blend comes off easily in an ultra-sound bath, using a bit of detergent. At many retailers, STP is also available in a convenient 7-ounce tube, so you don’t have to buy a large bottle.
Another even cheaper option is assembly lubricant. For turning his case necks, RStreich uses assembly lube from an auto parts store. He notes: “The brand I have is reddish in color and kind of sticky like honey. It’s far better than the Imperial die wax I was using before.” There are a variety of types, both with and without moly additive, and you can select the viscosity you prefer if you sample a few brands. Be sure to clean out any lube residue from the inside of your necks when you have completed your neck-turning.
If you asked a group of shooters to explain the difference between CUP and PSI, the majority would probably not be able to give a precise answer. But, for safety reasons, it’s very important that all hand-loaders understand these important terms and how they express cartridge pressures.
The ANSI / SAAMI group, short for “American National Standard Institute” and “Sporting Arms and Ammunition Manufacturers’ Institute”, have made available some time back the voluntary industry performance standards for pressure and velocity of centerfire rifle sporting ammunition for the use of commercial manufacturers. [These standards for] individual cartridges [include] the velocity on the basis of the nominal mean velocity from each, the maximum average pressure (MAP) for each, and cartridge and chamber drawings with dimensions included. The cartridge drawings can be seen by searching the internet and using the phrase ‘308 SAAMI’ will get you the .308 Winchester in PDF form. What I really wanted to discuss today was the differences between the two accepted methods of obtaining pressure listings. The Pounds per Square Inch (PSI) and the older Copper Units of Pressure (CUP) version can both be found in the PDF pamphlet.
CUP Pressure Measurement
The CUP system uses a copper crush cylinder which is compressed by a piston fitted to a piston hole into the chamber of the test barrel. Pressure generated by the burning propellant causes the piston to move and compress the copper cylinder. This will give it a specific measurable size that can be compared to a set standard. At right is a photo of a case that was used in this method and you can see the ring left by the piston hole.
PSI Pressure Measurement
What the book lists as the preferred method is the PSI (pounds per square inch or, more accurately, pound-force per square inch) version using a piezoelectric transducer system with the transducer flush mounted in the chamber of the test barrel. Pressure developed by the burning propellant pushes on the transducer through the case wall causing it to deflect and make a measurable electric charge.
Q: Is there a standardized correlation or mathematical conversion ratio between CUP and PSI values?
Mahin: As far as I can tell (and anyone else can tell me) … there is no [standard conversion ratio or] correlation between them. An example of this is the .223 Remington cartridge that lists a MAP of 52,000 CUP / 55,000 PSI but a .308 Winchester lists a 52,000 CUP / 62,000 PSI and a 30-30 lists a 38,000 CUP / 42,000 PSI. It leaves me scratching my head also but it is what it is. The two different methods will show up in listed powder data[.]
So the question on most of your minds is what does my favorite pet load give for pressure? The truth is the only way to know for sure is to get the specialized equipment and test your own components but this is going to be way out of reach for the average shooter, myself included. The reality is that as long as you are using printed data and working up from a safe start load within it, you should be under the listed MAP and have no reason for concern. Being specific in your components and going to the load data representing the bullet from a specific cartridge will help get you safe accuracy. [With a .308 Winchester] if you are to use the 1% rule and work up [from a starting load] in 0.4 grain increments, you should be able to find an accuracy load that will suit your needs without seeing pressure signs doing it. This is a key to component longevity and is the same thing we advise [via our customer service lines] every day. Till next time, be safe and enjoy your shooting.
Gavin Gear of UltimateReloader.com recently tested the impressive Henderson Gen 3 (V3) Trimmer. There is a full write-up on Gavin’s website, and you can watch Gavin’s 18.7-minute video review below.
Gavin states: “I met Todd Henderson at SHOT Show and it’s clear that quality control and customer experience are extremely important to him. The Henderson Gen 3 case trimmer is built on an adjustable tri-trim 3-way cutter with different pilots to accommodate different case necks. Three way cutters trim to length and chamfer the inside and outside all at once. This trimmer has a 1700 RPM spindle and a custom DC motor made in the USA. It is made of billet aluminum and has a taper-lock cutting head and is consistent to 0.002″” at least with the same brand of brass. The collets are Brown & Sharpe style collets and are interchangeable with Forster case trimmer collets. Henderson currently offers four collets, and one is supplied with each machine.”
Gavin explains the trimming process: “I had some 6mm Dasher brass I’ve fired a few times and wanted to take down 5-10 thousandths. The Henderson trimmer works much like a milling machine. You do not need much torque because of the way the taper works.”
The Henderson Gen 3 trimmer delivered outstanding cartridge length consistency after trimming: “I was careful to ensure my trimming process was as consistent as possible. I measured the first ten cases I ever trimmed on the unit and found a standard deviation of 0.00047. The extreme spread is actually less than advertised. This trimmer is fast and easy to use and most importantly, returns consistent results.”
F-Class John Review of Henderson Gen 3 Trimmer
Our Editor F-Class John has also reviewed the Henderson Trimmer. He liked the product so much he purchased one, and he uses it regularly now to trim his .284 Win cases for F-Open competition.
John liked the precision of the Henderson trimmer and the overall design of the machine, which offers good ergonomics and very precise alignment of the cases. Cycling is smooth and positive, as you can see from the videos. Fit over the pilot was fine for John’s .284 Win brass, but he notes that other users may need to expand their case necks appropriately to fit their pilot.
Watch the video to see the Henderson trimmer in action. The dual, parallel horizontal support shafts provide precise alignment of the case as it moves inward toward the cutter blade. The Taper-Lock cutter provides a 14-degree inside chamfer and 30-degree outside chamfer. The trimming process is very consistent case after case, and the Henderson’s design captures brass shavings effectively.
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.
Velocity and powder charts
Bullet 1 (L-R), the RN/FB, has a very slight taper and only reaches its full diameter (0.284 inch) very near the cannelure. This taper is often seen on similar bullets; it helps reduce pressures with good accuracy. The calculated BSL of Bullet 1 was ~0.324″. The BSL of Bullet 2, in the center, was ~0.430″, and Bullet 3’s was ~ 0.463″. Obviously, bullets can be visually deceiving as to BSL!
For Neck-Turning, Try STP Blend or Assembly Lube
Another even cheaper option is assembly lubricant. For turning his case necks, RStreich uses assembly lube from an auto parts store. He notes: “The brand I have is reddish in color and kind of sticky like honey. It’s far better than the Imperial die wax I was using before.” There are a variety of types, both with and without moly additive, and you can select the viscosity you prefer if you sample a few brands. Be sure to clean out any lube residue from the inside of your necks when you have completed your neck-turning.
CUP Pressure Measurement
