The late Bill Myers was recognized as one of greatest rimfire smiths who ever lived. Myers crafted many match-winning, record-setting rimfire benchrest rigs. Here we feature one of Bill’s most interesting creations — a clamping action that allows a rimfire barrel to be indexed (rotated) around the bore axis.
Bill was a creative thinker, and his own exhaustive testing has convinced him that barrel indexing can enhance accuracy in rimfire benchrest guns. Myers did acknowledge that, particularly with a very good barrel, the advantages of indexing may be subtle, and extensive testing may be required. Nonetheless, Myers believed that indexing could improve rimfire accuracy.
Indexing with the Myers’ Clamping Action
To index the barrel, Myers simply loosens the three clamping-bolts and rotates the barrel in the action. Because there is no thread to pull the barrel in or out, the headspace stays the same no matter how much the barrel is rotated. In other words you can rotate the barrel to any position on the clockface and the headspace remains unchanged.
The Challenge of Barrel Indexing With a conventional barrel installation, employing a shoulder with a threaded tenon, it is difficult to index the barrel. Even with a cone breech (photo right) that eliminates the problem of extractor cuts, you’d have to use shims to alter the barrel index position, or otherwise re-set the shoulder each time you screwed the barrel in further.
Clamping Action Allows Barrel to Be Rotated to Any Position
Bill has come up with a masterful solution to barrel indexing. He designed and built his own prototype custom action that clamps the barrel rather than holding it with threads. The front section of the action is sliced lengthways, and then clamped down with three bolts. A special bushing (the gold-color piece in photos) fits between the barrel and the action. By using bushings of different inside diameters, Bill can fit any barrel up to an inch or so diameter, so long as it has a straight contour at the breech end. To mount the barrel, Bill simply places the fitted bushing over the barrel end-shank, then slips the “sleeved” barrel into the front end of the action. Tighten three bolts, and the barrel is secure.
People are still complaining that affordable .22 LR rimfire ammo can’t be found. Well folks, we found some. Just call Bullets.com or Midsouth Shooter’s Supply and get yourself some Norma Tac-22 or Match-22. This is good stuff, at reasonable prices. Check out this review of Tac-22 by rimfire specialist .22 Plinkster. This Norma ammo won’t win rimfire benchrest matches, but it is plenty good enough for fun shooting, offhand practice, and tactical rimfire games.
.22 Plinkster Review of Norma Tac-22 Ammunition
Summary by .22 Plinkster (see 4:30 time mark): “I’m pretty impressed with it … I think it’s a really good deal. For six dollars and fifty cents [per box] you can’t go wrong with a box of this ammo. Out of a good bolt gun, this ammo will drive tacks.”
For centerfire ammo, you can choose from dozens of flip-top boxes, storage bins, or milsurp-style ammo cans. For rimfire ammo, there are not so many good choices. Our preferred rimfire ammo carrier is the MTM SB-200 Small-Bore Fitted Ammo Box. This flip-top plastic box holds 100 rimfire rounds in 10×5 black grids on the left and right. In the center is a storage area that will hold another 100 rounds in factory boxes. MTM’s SB-200 box was recently re-designed so it will now hold 17 HMR rounds, as well as 17 Mach 2, 22 short, 22 Win Mag Rimfire, and of course 22 Long Rifle (.22LR)
MTM Case-Gard 200 Round Smallbore Box
This is really the only product of its kind on the market. It allows you to conveniently and securely hold 200 rimfire rounds, and also segregate your ammo by brand or bullet type. These boxes fit all types of popular rimfire ammunition. The vertical clearance of the lid is sufficient to hold the longer .22 WMR Rounds, and 17 HMR (as well as .22 LR naturally). The lid fits securely so you don’t have to worry about your rimfire ammo spilling out on the way to the range.
If you don’t have one of these boxes yet, we recommend you order one or two. They cost less than $15.00 and are available in Blue or “Rust” (a brick color).
Photo shows Bryan Litz (on right) and tester Mitchell Fitzpatrick. Bryan said: “Only 2,445 rounds to go! We’re testing over 50 ammo types in five different twist barrels… science can be exhausting!”
Do you know the actual BC (Ballistic Coefficient) of your rimfire ammunition? Well Applied Ballisitics will soon have answers for you. Bryan Litz and his team of testers have been working on a Herculean project. They’ve been testing over fifty types of .22 LR ammo, using five different twist-rate barrels.
The 17 Winchester Super Magnum Rimfire (aka Win Super Mag or WSM) is the fastest, most potent modern rimfire round you can buy. This cartridge, which uses a modified nail gun casing, drives 20gr bullets at 3000 fps. The 17 WSM offers superior ballistics to all .22 rimfires, and is a clear step ahead of the 17 HMR. That makes this round a potential “game-changer” in the varmint fields. To guage the capabilities of the 17 WSM, Varminter.com tested the cartridge in the new Ruger 77/17 bolt-action rifle. Click HERE for Varminter.com Ruger 77/17, 17 WSM Review.
17 WSM shoots faster than the 17 HMR, so the 20gr bullets don’t drift as much in the wind:
Varminter.com reports: “The much-anticipated Ruger 77/17 chambered in the 17 Winchester Super Magnum (17WSM) has been released. Our Review Editor, William Chambers, put it through a full range test with all four currently-available ammunition loads. Afterwards, he took it on a short groundhog hunt[.] We put a lot of rounds through the guns we test, at targets, through chronographs and out in the field. This report includes all currently available 17 WSM ammunition and a sneak peek of the really nice Nikon Prostaff 5 riflescope.” READ REVIEW.
GUNS Magazine has just released a 180-page Special Edition dedicated to .22 Rimfire products — guns, accessories, and ammo. Rimfire fans may want to pick up the latest .22 Rimfire Book which covers all .22 rimfire types, from CB caps to the .22 WMR. The cover story features the new .22LR Charger handgun from Ruger. Varminters will enjoy the discussion of the .22 Magnum, a versatile round that is effective on squirrels and other small critters. Other features in this Special Edition include a review of the Volquartsen Custom Deluxe pistol, Dave Anderson’s take on the top .22 target pistols, and an article on Sig Sauer’s newest silencers.
Our favorite story was a history of High Standard’s .22 Match Pistols by contributor Robert Kolesar. High Standards are lovely guns, with a well-deserved reputation for accuracy. “Unlike a number of classic guns from the past, the High Standards I remember fondly are still in production,” Kolesar writes. “And they haven’t changed to keep the liability lawyers or bean counters quiet. Arguably, it’s a better pistol, with tighter quality control, sight upgrades not available previously and a good factory trigger — just too good a pistol to be forgotten.”
Any experienced varmint hunter knows the value of a good .17 HMR rifle, particular when used inside 150 yards on small critters such as ground squirrels. The .17 HMR is a great round, but for general plinking and target practice, we prefer shooting the venerable .22 Long Rifle. The .22 LR has less recoil and less noise. Importantly, .22 LR ammo (even with today’s shortages) remains much less expensive than .17 HMR ammunition.
Wouldn’t it be great if a single, affordable varmint rifle could shoot both .22 LR and .17 HMR? Well, CZ offers just such a rig — the CZ Model 455 American Combo, a versatile switch-caliber rifle priced at about $485.00 (MSRP is $531.00). The American Combo comes complete with both .22 LR and .17 HMR barrels, easily interchanged with a simple Allen wrench. As CZ explains: “The CZ 455 eliminates the need to spend the extra expense on a second rifle when you want to add another quality shooter to your rimfire battery”. For a bit more money, you can even purchase a .22 WMR barrel, making your CZ a triple-threat varmint-slayer.
Some folks think you need a new (or nearly-new) barrel to win a benchrest match. That may be true in the centerfire game, but in the world of rimfire benchrest, things are different. Good barrels can remain accurate for a long, long time. That was demonstrated by our friend Joe Friedrich who recently set a new ARA 4-target Aggregate record. Joe was shooting his trusty old “Sweet Pea” rifle with a very well-worn barrel. In fact, Joe’s record-setting Benchmark barrel has logged well over 100,000 rounds. That’s right, a barrel with over 100K rounds shot the best 4-target ARA Agg ever. Will wonders never cease…
In this video, Joe talks about his rifle, the amazing longevity of his Benchmark barrel, and the ELEY ammo he used to shoot two 2500s on the same day (with a 2475 average for four targets):
The experts at ELEY Limited, top rimfire ammo-maker, have posted a helpful guide to cleaning rimfire barrels. We reprint highlights of the article below, but we suggest you read the full article on the Eley website: How to Clean Your Rifle the ELEY Way.
Editor’s Comment: This is not the only way to clean a rimfire barrel. There are other procedures. This is the method recommended by ELEY based on decades of experience with the top smallbore shooters in the world, including many Olympic Gold Medalists. Some shooters have been very successful cleaning less frequently, or using different types of solvents. The ELEY method is a good starting point.
Rimfire Barrel Cleaning
1. Clean the extension tube with a 12 gauge brush and felt or tissue moistened with solvent.
2. Smoothly insert a cleaning rod guide into the receiver.
3. Apply a dry felt to the cleaning rod adapter and push it through the barrel to the muzzle in one slow steady movement. As the felt is dry it may feel stiff.
This is the kind of family-friendly, “feel-good” story we like. Texan Richard King created a rimfire benchrest rifle using a classic Martini Mark III smallbore action. He fitted the gun with a new flat, wide forearm and a new buttstock, allowing the gun to sit steady on the bags and track smoothly. The narrow action was also fitted with a cantilevered top rail to hold a high-magnification scope.
Here is Vicki King, with Martini Mark III and her trophy.
But here’s the best part. Richard provided this updated classic to his wife Vicki, who proceded to win a rimfire benchrest match (Vintage class) with the old Martini. Richard reports: “Here is my lovely wife with her High Overall Vintage trophy. That is a Martini Mark III that I re-stocked in walnut for 50-yard, .22-caliber benchrest matches. It’s great to have her shooting with me again.” FYI, last summer Richard and Vicki celebrated their 50th wedding anniversary!
Bravo Richard — kudos to you AND to your lovely bride. It’s great to see a couple shooting together. It’s also great to see a classic rifle brought back to the winner’s circle with some inspired stock-work and other upgrades.
Here is Richard King, with his handiwork — an updated Martini Mark III smallbore rifle.
With a conventional barrel installation, employing a shoulder with a threaded tenon, it is difficult to index the barrel. Even with a cone breech (photo right) that eliminates the problem of extractor cuts, you’d have to use shims to alter the barrel index position, or otherwise re-set the shoulder each time you screwed the barrel in further.
The experts at 
