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November 27th, 2023

Checking the Uniformity of Neck Bushings — Some Surprises

bushing neck die run-out concentricity

Do you use bushings to size your case-necks? Are you assuming that your bushings are actually round on the inside, with a hole that’s centered-up properly? Well you may be in for an unpleasant surprise, based on what our friend Jim de Kort recently discovered. Jim was concerned about the run-out on his brass. His cases went into his bushing-equipped FL die pretty straight, but came out of the die with up to .004″ run-out. “What gives?”, Jim wondered. “Could the problem be the bushings themselves?”

To answer that question, Jim decided to examine his bushings. Using an Accuracy One Wheel-drive concentricity gauge, Jim checked out some of his neck bushings. What he discovered may surprise you…


Neck Bushing Flaws Revealed

Trust no one… — Jim de Kort

Jim writes: “I measured the concentricity of my 6BR rounds today. I noticed they went into the neck-bushing equipped full-length sizing die with less than .001″ deviation but came out with .003-.004″. The culprit, it appears, was the bushing itself. Without it the cases stayed within .0005″ to .001″ deviation, so something was happening with the bushing.

One bushing had .00025″ deviation on the outside, yet almost .003″ on the inside, so it is crooked. But even when using a bushing that is within .001″ I still get .003″ runout after sizing. I repeated the same procedure for my 6×47 and got the same results. When using the bushing, concentricity suffers a lot.”

Before we bash the bushing-makers, we must acknowledge that many different things can contribute to excessive run-out and/or mis-alignment of case-necks. We don’t have all the answers here, and Jim would be the first to say that some mysteries remain. Still, these are interesting results that give all precision hand-loaders something to think about.

Jim Borden of Borden Accuracy also offers this tip: “Check the trueness of the face of the die cap. That has more to do with trueness than the bushing. Also check perpendicularity of hole in bushing to top surface. When I was making dies, the cap was made by threading and facing the threaded tenon in same setup.”


Editor’s Comment: Many people have great results with neck-bushing dies, but Jim isn’t the only fellow who has seen some very odd results. I personally employ honed, non-bushing dies for many of my chamberings. These non-bushing dies (with the necks honed for .002-.003″ neck tension) produce extremely straight ammo, with run-out consistently under .0015″.

Permalink - Articles, Bullets, Brass, Ammo, Reloading 2 Comments »
March 25th, 2023

Saturday Movies: Six Bolt Action Reloading Channel Videos

YouTube bolt action reloading video saturday movie showcase mistakes dies neck-sizing primer pocket uniforming

Bolt Action Reloading is a popular YouTube channel that has amassed nearly 75,000 subscribers. For this Saturday Video Showcase we’ve selected six interesting videos. If you’re getting started in reloading, definitely watch the video on Five Common Mistakes. And all handloaders can benefit from the videos which covers affordable tools, all under $50.00.

Five Common Mistakes Made by Novice Handloaders

This video spotlights five (5) common mistakes made by people when they get started hand-loading ammunition. These are some of the most common errors and misconceptions that affect “newbie” reloaders. Here are the five common problems encountered by folks getting started in handloading:

1. Not Using LOAD DATA from a Reliable Source — Use verified, properly developed load data from a powder maker or bullet maker. Don’t trust private social media posts. And always start conservatively.
2. Inconsistent Case Sizing — this can be the result of sloppy die set-ups or not knowing how to measure cases correctly.
3. Cartridge Overall Length (COAL) Variances — Don’t assume that COAL book values apply to your ammo. You should measure your own cases based on your chamber, headspace, and bullet choice. AccurateShooter.com recommends you use QuickLoad or Gordon’s Reloading Tool software to help adjust loads for different COAL.
4. Hand-Loading Is Not Always a Money-Saver — For a cartridge you don’t shoot much (say a .30-06 for hunting only), hand-loading might not save you money once you count the cost of dies and tools.
5. Reloading Kits Are NOT Complete — Don’t assume that the $500 reloading kit you acquired (with press, powder measure, scale etc.) has all the components and tools you actually need. You will still need dies, comparators, and many other tools.

Primer Pocket Uniforming — Is It Worth the Time and Effort?

With Lapua and Peterson brass we have had very good results — great accuracy and with low ES and SD — using brass that has NOT had the primer pockets uniformed with some kind of cutter. We always do check to make sure there are no flakes or obstructions in the flash holes, but we generally do NOT need to cut into the pockets. But with lesser brands of brass you can benefit from uniforming your primer pockets. And yes there are some top shooters who DO uniform pockets even on premium-brand brass. That is up to you. This video explains the process for primer pocket uniforming and looks at some test results.

Developing a Load — OCW vs. 10-Round Ladder

This video talks about two methods of determining an accurate load. We include this video here because many people are curious about Optimal Charge Weight (OCW) load development. Frankly, however, we believe there are better, more reliable ways to find a good load — many people have wasted many hours and much barrel life on the OCW quest. NOTE: With a good cartridge of known accuracy, such as a 6mmBR or 6mm Creedmoor using top-quality brass, we really do NOT advocate either method described in this video. We suggest you do a search to find the best bullet choice and powder choices. Then, if you are shooting from the bench with a custom barrel, consider starting in the lands, about .003-.005 past first touch. NOT full jam!! If you are shooting in conditions where you may have to unload a round during a match, start .020″ back from first touch. Chronograph every round. Shoot three-shot groups at 100 yards, looking to keep all shots touching. Many people doing OCW waste a ton of time (and barrel life). And one bit of advice for people with average factory barrels — it may be pointless to expect anything much under 1 MOA from that barrel no matter what you do.

Handloading Cool Tools — All Under $50.00

Along with powder measure, dies, and reloading press, there are a wide variety of tools that can help achieve good results when handloading ammo. This Bolt Action Reloading video identifies ten (10) tools that can be acquired for $50.00 or less. Here is the list:

1. Check Weights (00:20) — These help ensure your scale is measuring properly.
2. Digital Calipers (00:57) — You can spend $200+ on calipers, but you can get good results from caliper that cost less than $50.00, and every reloader should have a back-up set of calipers.
3. Comparator Sets (01:26) — These are fittings that attach to calipers. Bullet Comparators are sized to fit a bullet diameter to get reliable base-to-ogive measurements. Case comparators fit the neck of the cartridge, allowing you to measure shoulder bump.
4. Stock Case Remover (02:48) — This allows you to remove a brass case that may be stuck in a die.
5. Imperial Sizing Die Wax (03:20) — There are many types of case lubricants, but Imperial Die Wax is still a popular choice and very affordable.
6. LEE Cutter and Lock Stud (03:44) — This is a cheap way to trim cases. We prefer a Forster trimmer or a deluxe power trimmer but LEE system is inexpensive.
7. Chamfering and Deburring Tools (04:38) — After brass is trimmed to length you need to chamfer and deburr the case necks. Good chamfering/deburring tools are “must have” items for hand-loaders.
8. Case Neck Brushes (05:50) — If you don’t tumble your brass it’s a good idea to brush the inside of your fired cases before seating bullets. A couple swipes is all it takes — and you may find you get more consistent seating if you leave a bit of carbon in the necks.
9. Primer Pocket Swage Gauge (Ballistic Tool) (06:24) — These little tools let you check the dimensions of your primer pockets.
10. Decapping Die (06:57) — The decapping die removes spent primers without sizing the case. This is very handy if you want to remove primers before tumbling brass. NOTE: If your cases have small-diameter flash-holes you need to check the diameter of the decapping rod.
11. Powder Trickler (07:40) — A good trickler is an absolute “must have” when manually weighing each charge. The trickler allows you to add a couple grains at a time.
12. Powder Funnel with Drop Tube (08:45) — While most folks have a basic funnel, a deluxe funnel with a drop tube helps to get a full charge and more consistent powder density.
13. Kinetic Bullet Puller (09:36) — This is like a hammer that holds a loaded round. Using kinetic energy this tool can unseat a bullet with a couple of whacks. However, if you must unload a large quantity of rounds you’ll want a cam-lock bullet puller (09:58) that works with your press.
14. Caliber Specific Reloading Trays (10:28) — These are handy if you are loading specific cartridges. There is less wobble for each round.

Setting Neck Tension with Expanders and/or Bushings

There are three main ways (in addition to collet dies), by which you can set the neck diameter on cartridge brass and thereby control neck tension or the “grip” on the seated bullet. First, the sizing die itself can reduce the neck diameter. This can be a fitted die with the neck honed to a precise diameter. Or, the die can take neck bushings, which allow a range of neck tensions via different bushing internal diameters. Because they allow a wide range of tension settings, bushing dies are popular and effective. You can also have a die that takes the neck dimension down a few thousandths, but then have an expander mandrel that brings the neck inside diameter to an exact dimension. This has the advantage of keeping the INSIDE of the neck perfectly round, with any variances in neck-wall thickness pushed to the outside. This Bolt Action Reloading video explains the use of neck bushings and expander mandrels.

Full-Length-Sizing vs. Neck-Sizing of Cases

NOTE: At AccurateShooter.com we recommend that handloaders always full-length size their brass for many important reasons. Virtually all champion shooters in multiple disciplines full-length size their brass. Full-length sizing can achieve record-setting accuracy, and, importantly, it offers consistent shoulder bump with each loading. But we know that people are curious about neck-sizing, so we are including this video.

This video compares identical charge-weight loads tested with full-length-sized 6.5 Creedmoor brass vs. neck-sized 6.5 Creedmoor brass. The tester states: “I use the 142gr Sierra Match King HPBT loaded with Alliant Reloder 16. There is velocity and group data at 150 yards. FYI, we recommend always full-length sizing most cartridge brass, bumping the shoulder about .003″ (or more if required in a semi-auto).”

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May 29th, 2022

Sunday Gunday: 20 Practical AR — Great Accuracy, Low Recoil

20 Practical AR uppers

If you want to use an AR-platform rifle in the varmint fields, consider getting a 20-caliber barrel chambered for the efficient, low-recoil 20 Practical cartridge. The 20 Practical is simply a .223 Remington necked down to 20 caliber. The parent .223 Rem cartridge of course works great in an AR, but the 20 Practical offers some notable advantages for high-volume varmint shooters. The 20 Practical delivers very high velocity with very low recoil while still providing outstanding accuracy. The 20 Practical is great option for folks who favor “fast and light” — smaller, lower-mass bullets traveling at very high velocities. This little cartridge can launch 40-grainers at over 3900 fps, and 32-grainers even faster. This makes the 20 Practical a great choice for an AR-based varmint rifle.

20 Practical20 Practical Ultimate Varminter
A decade ago, as a “proof-of-concept”, AccurateShooter.com created a 20 Practical AR15 Ultimate Varminter with a custom 20-caliber upper from Robert Whitley of AR-X Enterprises, LLC. That project rifle was ultra-accurate — every 5-shot group out of the gun was less than the size of a dime. That gun was auctioned off, but Robert Whitley continues to produce custom 20 Practical AR15 uppers. (The 20 Practical cartridge is simply the .223 Rem necked down to 20 caliber — you can use standard .223 brass and load with standard.223 Rem dies. Just swap in a smaller expander and use smaller neck bushings.)

Robert learned that the accuracy of the first 20 Practical AR15 was no fluke. After building six (6) more 20 Practical uppers, he tested them for accuracy and they all shot great. These uppers feature DPMS low-pro receivers with side-charging handles. They are fitted with PacNor 1:11″ twist, 3-groove stainless barrels.

20 Practical AR uppers

Robert reports: “We have been making more 20 Practical AR15 uppers and I have to say I am astounded by the accuracy of these things. For shooting little tiny groups out of an AR15 with bullets going 3500+ fps, it’s hard to beat the 20 Practical. Today I test-fired six more uppers, all with 11-twist barrels. Three of the uppers had 24″ barrels, two had 20″ barrels, and one had an 18″ barrel (we call it ‘Stubby’).

20 Practical Reamer print

In four of these uppers I shot re-sized Winchester brass using 25.3 grains of WC844 powder with Berger 40gr BTHP bullets loaded at 2.225″ OAL (about .015″ off the lands). WC844 is inexpensive military surplus powder that is nearly identical to H335. I tried three different primers and the choice did not seem to matter (CCI BR4, Rem 7 1/2s and Win Small Rifle — the old silver ones). All these four uppers shot great.”

Below is an animated GIF with targets from uppers #6, 10, and 11. All groups are mag-fed, 5-shot groups shot at 100 yards using a front rest and rear bag.


Targets Shot with Three Different 20 Practical AR Uppers

20 Practical AR uppers

For more INFO visit www.6mmAR.com, or email: rcw3 [at] erols.com.

20 Practical Shooters Explain Why They Love this Little Cartridge

A current thread in our Shooters’ Forum focuses on favorite variants of the .223 Rem cartridge. The thread asks: “What is your favorite and most versatile round that you have made from a .223 Rem parent case?” Many cartridges were named, but the wildcat cartridge cited most often was the 20 Practical. Here are some comments by Forum members, who explain the appeal of this great little 20-caliber cartridge:

“The 20 Practical is just a hoot to shoot. Outstanding precision, minimal recoil, easy case forming and inexpensive to shoot. What’s not to like? It’s a great way to introduce kids to centerfire, too.” — JLT

“The 20 Practical for me. Never had as much fun shooting a rifle as I did with the 20 Practical. Also, [it is] the easiest wildcat to form. Just get cases, a couple of bushings to get the right neck tension, and you are shooting.” — NMKid

“Favorite .223 Rem Wildcat? The 20 Practical hands down for me. I have two of them built on Savage actions right now. One has a 20″ BHW barrel and the other has a 26″ Criterion. It is my go-to caliber for shooting up a Prairie Dog town and the ones I have are insanely accurate. Here are some typical 100- and 200-yard groups with my 20 Practicals.” — IA_Shooter

.20 20 practical ar15 varmint cartridge wildcat .223 Rem Shooters' Forum

“My favorite was and is the 20 Practical. No fire-forming, no neck-turning, and with the increased BC of the 20 Cal bullets, it’s hard to wipe the smile off your face in a prairie dog town[.]” — Region Rat

“20 Practical and the [original] .223 Rem are my favorites. Accurate, cheap to shoot. The 20 Prac allows you to see your hits and it’s fast.” — Alguapo

“20 Tactical or 20 Practical. Both very easy to reload and/or form from .223 brass. And they are accurate, reach out on varmints at surprising ranges.” — Bill K

Smart Tips on Forming 20 Practical Cases

Varmint ace Warren B, aka “Fireball” in our Forum, explains how to form 20 Practical Cases. “Forming 20 Practical cases is very easy and no fire-forming is required. Start with any good quality .223 Rem brass. One can simply run the case into your bushing die with the appropriate bushing and call it done. I however like to make it a little more involved by doing the neck reduction in steps. I find that taking steps doesn’t overwork the brass as much as one step does. Also, if you resize the neck in too large of a step, sometimes, depending on the neck thickness, the neck will not be dimensionally what you would expect when finished. This is especially important towards the last step when one is getting close to the final required neck diameter.

For my cases the first thing I did was to run them into an old RCBS .223 Rem full length die with the decapping assembly removed. This will take care of any dented necks on the raw cases and bring the necks down to around 0.243″. Since all standard full-length dies oversize the necks way too much, starting with a .223 FL die actually reduces the neck diameter quite a bit–and obviates the need to buy an extra bushing for the first step. I then use my Redding Type-S die with two bushing sizes to get down to where I need to be. In other words, I start with the FL sizer, then move to a Type-S with a 0.233″ bushing and finish with a 0.228″ bushing. Notice how, as I get to the final step, I use progressively smaller increments in size between the reductions.” (Note: Depending on your brass your final bushing size may be different.)

20 Practical vs. 20 Tactical

Varminter Kevin Weaver, who shoots both the 20 Practical and 20 Tactical, states that: “Both the 20 Tactical and the 20 Practical are fine .20 caliber cartridges. However, my favorite would be the 20 Practical. The 20 Practical gives the SAME performance as the 20 Tactical without fire-forming, or having to buy expensive forming dies.

So with the 20 Practical you do less work, you shell out a lot less money, yet you give up nothing in performance. What’s not to like? To create 20 Practical cases, just buy a .223 Rem Redding Type “S” Bushing Die set with a .230 or .228 bushing and have fun with this great little cartridge.

The 20 Practical and the 20 Tactical are almost identical cartridges. There are only slight differences in case outside diameter, shoulder angle, and case body length. Neck length on the 20 Tactical is a bit longer, but there is still plenty of neck on the 20 Practical to grip the popular bullets, such as the 32gr V-Max.”

20 Practical and 20 Tactical Specifications:

Cartridge Bolt face to shoulder Shoulder O.D. Shoulder Angle Total length
20 Practical 1.5778″ .3553 23° 1.760″
20 Tactical 1.5232″ .360 30° 1.755″
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