Many short-range Benchresters have thought about converting their 6 PPC to shoot a 30BR for score matches, or a Dasher for mid-range (or even 1000-yard) games. That way you have a rifle that does double duty, giving you the most bang for your buck. Though an action with a PPC bolt won’t normally work with 30BR/6BR/Dasher cases with their larger .308-class rim (0.4728″ diameter), there is a pretty easy solution that allows you to cycle these bigger cartridges with a 6PPC-style bolt (designed to fit .220 Russian rims).
“Rebating case rims … lets you shoot a 30BR in score matches using your PPC action. All you need is a new barrel. This saves buying another bolt, receiver, or rifle.” — Butch Lambert
Butch Lambert of ShadeTree Engineering provided this tip. Butch notes that many 6 PPC benchrest group shooters also enjoy shooting in score matches. But to be really competitive in the BR for score game, that means shooting a 30BR, which has a wider, .308-class rim (0.4728″ diameter). Likewise, if you want to compete in 600-yard registered BR events or in varmint matches, you probably want to run a bigger case, such as the 6BR, 6mm Dasher, or 6-6.5×47. Those cartridges also have the larger 0.4728″ rims.
Cutting Head for Rebating Rims
To convert a PPC-boltface action to shoot the bigger cases you can spend a ton of money and buy a new bolt. That can cost hundreds of dollars. The simpler solution is to turn down the diameter of the larger cases on a lathe. Butch explains: “We’ve seen plenty of interest in rebating case rims. This lets you shoot a 30BR in score matches using your PPC action. All you need is a new barrel. This saves buying another bolt, receiver, or rifle if you have a PPC boltface. Anyone who has access to a lathe can do this job pretty easily. Yesterday I turned 150 case in about an hour.” At right is the lathe form tool Butch uses to rebate the case rims.
Kelbly makes outstanding actions, including the Stolle Pandas. In the past 20 years, Pandas have probably won more benchrest matches than any other action (though BATs and Bordens are increasingly in the winning circle). Recently gunsmith Alex Wheeler of Wheeler Accuracy worked his magic on an aluminum Panda, optimizing the “ignition timing” of the action. This involves many small mods to bolt, camming surfaces, trigger, and firing pin: “The whole cam helix and detent shelf is re-cut. The firing pin and cocking piece are modified as well.” When executed properly, Ignition Timing has a number of benefits, including a smoother bolt opening/closing, improved firing pin fall, and enhanced accuracy (though the accuracy improvements can be subtle).
BEFORE Action Timing — Stiff and Clunky
Alex reports: “Normally Panda actions have plenty of firing pin fall. For one reason or another this one was very low. Before timing, firing pin fall was .210 with a Bix’N Andy (BNA) trigger. After trigger timing firing pin fall is .244 with zero cock on close.” Here is how the action functioned before timing work:
CLICK Photo to start VIDEO
Alex notes: “As you can see, after the cocking piece rides out of the detent notch it thenfalls to the trigger and is then re-cocked. This is normal on most un-timed actions.”
AFTER Action Timing — Smooth and Refined
Alex explains the modifications he made for this Panda action: “Moving the trigger back adds cock on close. The whole cam helix and detent shelf is re-cut. The firing pin and cocking piece are modified as well. I do love a timed Panda. In fact, I like aluminum actions, I think there is something to them. But yes, I also recommend Borden as my first choice.’
CLICK Photo to start VIDEO
Fix for Right-Bolt Actions Only
After seeing these videos on Facebook, one poster asked: “I do like my Panda but this is exactly why I bought a Borden action and I love it. It’s good to know you can make a Panda better. Alex, can you time a left bolt Panda?”
Alex replied: “No, the tooling I built is all for right hand actions sorry….”
With all the buzz about the 6.5 Creedmoor and its 6mm Creedmoor little brother, some folks forget that we’ve had an outstanding mid-sized, Across-the-Course cartridge for a long time — the 6XC. Pioneered by 11-time National High Power champion David Tubb, the 6XC has won national High Power championships, excelled in mid-range prone matches, and performed great in the varmint fields. It has also been used successfully by many Precision Rifle Series competitors. It’s no wonder — the 6XC has less recoil than a 6.5mm Creedmoor, there is a great selection of superb 6mm bullets, and Peterson 6XC brass is high-quality and reasonably priced ($69/100) from DavidTubb.com. Fine Norma 6XC brass is available from Grafs.com.
PRS Rifle with Modern 6XC II Chamber
Forum member Grimstod posted this new 6XC II rifle in our long-running Pride and Joy Rifle Thread. Grimstod notes: “These 6XC Gen IIs seam to be a hot commodity lately. This one is for PRS. It features a Premier Accuracy Atlas action made by Kelbly. The bolt and heavy-taper, fluted barrel are Cerakoted to match. I really like the ejectors on these Atlas actions. The stock is a KRG X-Ray painted in Premier Accuracy exclusive colors. The Kelbly Atlas action does not have any modifications. So far every Kelbly action we have tried has had perfect timing and trigger fall. We have been supper pleased with them. I look forward to using a lot more of these excellent actions.”
What is the 6XC II you may ask? That designates a 6XC with a chamber dimension optimized for Norma brass. It turns out that Norma brass is a bit bigger at the bottom than the 22-250 brass from which the 6XC originated. Robert Whitley of 6mmAR.com has created two new JGS reamer specs that fit the Norma brass perfectly, improving feeding and extraction. Here is Robert’s Report:
The 6XC II Chamber — Upgraded for Today’s Norma 6XC Brass
by Robert Whitley of 6mmAR.com
The 6XC II Chamber works perfectly with the Norma 6XC brass and resolves the “sticky bolt lift” issue. The original 6XC chambering was designed based off the usage of 22-250 brass which typically has a web diameter in the range of .461″-.463″. The area of the chamber just forward of the web on the original 6XC chambering was .4695″ which left plenty of clearance.
When Norma 6XC brass became available Norma appears to have developed the base of the case from the .308 Winchester line of cases which have a larger web diameter. The web diameter of the Norma brass typically measures right around .4685″ which leaves almost no diameter clearance.
As shooters would use Norma 6XC brass in an original 6XC chamber they typically would experience “sticky bolt lift” due to the lack of clearance and the fact that the large web diameter of the brass prohibited the re-size dies (no matter how small the base diameter was) from squeezing the brass down enough to create sufficient clearance. The 6XC II chamber resolves this issue. You can order 6XC II sizing dies from 6mmAR.com that work perfectly with this re-designed chambering. 6XC II die sets are in stock now — call (215) 348-8789 to order.
6XC II Long Range Reamer (Throated long for 105-115gr Bullets):
The 6XC II-LT reamer below is throated long to keep the full bearing surface of 110-115gr bullets forward of the neck/shoulder junction of the case. Note, 6mmAR.com has also developed a shorter-freebore version for 6mm bullets with shorter bearing surface. SEE shorter 6XC II Reamer Print.
6XC II Chamber and Sizing Die Combo:
- Resolves the “sticky bolt lift” problem shooters experienced using the Norma 6XC Brass in the original 6XC chambers.
– Chamber accepts all 6XC brass or ammo with no modification. Take your existing 6XC brass or ammo and use it without issues.
– Works well with existing Norma 6XC brass, or 6XC brass made from re-formed Winchester and Remington 22-250 brass.
– 6XC II Sizing dies and die sets are available from 6mmAR.com and in stock.
If you are looking for someone to chamber your rifle or re-barrel an existing rifle in the 6XC II chamber, Fred at Sabreco, Inc. in Skippack, PA, (610) 584-8228 can help you. He has the reamers for the cartridge as well as the head space gauges for the cartridge, and has had extensive experience chambering many barrels and rifles.
Area 419 is a top-tier manufacturer of reloading tools, shooting accessories, rails, suppressors, mag kits, and tactical/PRS rifle packages. To celebrate the 4/19 date which matches its company name, Area 419 is running a very compelling SPECIAL SALE. Right now you can save 10% on CZ tactical rifle builds, save 10% on suppressors, save 15% on select actions, save 20% on TriggerTech triggers, and save 50% on apparel.
In addition, during this special sale, pretty much everything else Area 419 sells is at least 10% Off. To take advantage of these big discounts, visit Area419.com and use CODE 4192020 during check-out. (NOTE: Some items, such as the TriggerTech triggers, are already discounted, so no check-out code is required). This sale runs through 11:59 pm ET on 4/20/20.
Specialty Pistols — Report from Ernie Bishop in Wyoming
For those who know of me in the shooting world, you would probably know me in one of two ways: Dealer for SEB Rests or someone who does most of his competing, varminting, and or hunting with specialty pistols. These are typically bolt-action, single-shot rigs that can be used with a bipod. They can seem very similar to a pistol-grip rifle, but without a conventional buttstock.
My interest in all things specialty pistols (Remington XP-100, TC Contender, MOA Maximum, Pachmayr Dominator, H-S Precision HSP, etc.) goes back to the early 1980s. Most of the specialty pistols listed are no longer made, so when I discovered that Kauger Arms was making two, I was excited. I have not had much time to shoot my new Kauger “Black Widow” chambered in 6.5×47 Lapua. But so far, the experience has been fun, even though I have not taken it prairie dog shooting yet or hunted big game with it. For this report, I went to my friend Dan’s place as one can load in the house, and simply shoot off his back porch.
When thinking of a precision shooting platform, most of you would not consider a wood back porch as ideal. But we managed a 0.179″ 3-shot group at 100 yards using a Harris bipod and a small leather bag. Yes the Black Widow can shoot! My load was Lapua brass, Federal 205M primers, Varget powder, and the Hornady 123gr A-Max, with a MV of 2514 fps. I selected the Hornady 123s with prairie dogs in mind. As shown in the top photo, the scope on the Black Widow is a Sightron S-III 6-24 with a Holland’s scope level. The Black Widow also sports a Holland’s Radial Baffle brake.
Here is the Black Widow with a different scope base and scope, ready to go on Dan’s porch.
The day we planned to shoot prairie dogs was windy, so we headed to public land nearby and set up steel to get ballistics drop info and simply to play at distance. We had 5″ steel at 220 yards, 10″ steel (diamond) at 510 yards, and 10″ steel (square) at 650 yards. Wind was from 8 mph to just over 20 mph, so the little 123 grainer was getting tossed about, while keeping us humble all at the same time. Regardless of the gusty winds, I considered the session a success!
Kauger Arms has been making parts for a number of companies in the firearm industry for over 20 years. In 2014 when things slowed down for them, they decided to start building rifles and decided to make their own actions. Good decision — these actions, which are machined in a single process to keep everything true to the bore, are great. Bolt manipulation with Kauger’s action is the smoothest I have ever experienced.
Tim Kauger explained features of his actions to me. The Kauger cock-on-opening action has a Rem 700 footprint for action holes and trigger shoe. The semi-coned bolt features a floating bolt head which is slightly smaller than the bolt body. The firing pin assembly is 1/4-turn removable. There are user-changeable bolt body and knob options. There is a side bolt release above the stock line. All moving surfaces are nitrided. This can be ordered single shot, feed rails or DBM cut. Also the long action will accept up to a .338 Lapua/.300 Norma Mag if ordered that way (with 1.25″ barrel cylinder).
Kauger Arms offers a right-hand or left-hand grip, which is very comfortable. I shot the Black Widow both right-handed and left-handed with no problems whatsoever. Kauger Arms can build the Black Widow in many more chamberings than the two that are listed on the KaugerArms.com website.
New left-bolt/left port action from Kauger Arms — To the specialty pistol shooters reading and to those considering entering the SP world, Kauger Arms has listened to your requests and is working on a left bolt/left port short action that will be offered either as a single-shot action or with bottom metal. You grip the pistol with your right hand, then run the bolt with your left-hand.
Specialty Pistol 2 — The Camo .223 Remington HSP
Here is another one of Ernie Bishop’s specialty pistols. This eye-catching camo-stocked rig was crafted by H-S Precision. Sadly, H-S Precision is not making these HSP pistols anymore. This .223 Remington features a 1:7″-twist, 15-inch-long H-S barrel fitted with the “H” Brake. On top is a Burris XTR-III 5.5-30x56mm scope with SCR 2 MIL reticle and Burris rings.
Great Results with Varget + 77gr Sierra TMKs
Ernie tells us: “For a load, I have been running Lapua brass, Rem 7.5 primers, Varget, and the 77 grain Sierra TMK. Muzzle Velocity is 2675 FPS. As you can see, it shoots pretty well. Shown at right is a measured 0.265″ 3-shot group at 100 yards, shot from Harris bipod and small field bag.
Previous to this, I was shooting Federal Match ammo with the 77 grain SMK (MV was 2500 fps), with prairie dog kills past 600 yards, and have played on steel out to 1000 yards. This H-S specialty pistol is great for young or old alike, for novice shooters or experienced shooters. Everyone needs a fast twist .223 Remington!”
Here is my friend Dan shooting the .223 Rem HSP with factory ammo during a prairie dog trip.
AR-platform rifles are fun and versatile, but the standard, mil-spec triggers leave much to be desired. They tend to be gritty, with creep and heavy pull weight. One of the easiest, most effective AR upgrades is a trigger group swap. An improved fire control group makes a huge difference. There are many aftermarket trigger options for the AR platform rifles. Choose single-stage or two-stage, either standard trigger assembly or unitized “drop-in” trigger, such as those made by Timney or Triggertech.
When upgraded with a precision trigger and match barrel, AR-platform rigs work great in NRA High Power competitions (Photo from NRA Blog, at Camp Perry).
Two-Stage vs. Single-Stage Triggers
Two-stage triggers have two separate movements. The first stage offers a light, spring-loaded pressure that works against the shooter’s pull until stopping at the second stage – this is called “take-up”. If there is no spring pressure, it is known as “slack”. Should the shooter continue to pull the trigger once he’s arrived at the second stage, the mechanism will operate like a single-stage trigger from there until engaging the sear and firing the gun. Some shooters prefer a two-stage trigger because it allows a mental preparation (first stage) before the final decision to “break the shot”.
Single-stage triggers feature no take-up or slack, as they begin engaging the sear as soon as the shooter begins pulling the trigger. Some competitive shooters prefer the two-stage trigger because of the feedback it provides during its first stage, while other shooters, including those using their rifle in tactical scenarios, may want the surety of a single-stage trigger, ready to engage and fire once their finger is inside the trigger guard. Regardless of preference, a good trigger will feature minimal creep and should be free of grittiness, providing a smooth, even break.
Drop-In Trigger Assembly vs. Standard Trigger Group
Once you decide between a single-stage or two-stage trigger, you can choose between standard and drop-in trigger groups. Standard trigger groups feature all the fire control group parts separated, and need to be pieced together and installed much like a mil-spec trigger, while drop-in trigger are pre-assembled and contained within a casing that simply drops in to the receiver and accepts the pins, hence the name.
After-Market Trigger Comparison
Some shooters prefer drop-in triggers due to the ease of installation, while others opt for standard groups so they can access the components individually for cleaning adjustment or replacement. If one piece of a drop-in trigger fails, you’ll need to either replace the entire unit or send it to the manufacturer for repair, whereas you may be able to simply replace the broken component of a standard trigger without needing a whole new trigger set.
Trigger Terminology — “Creep”, “Stacking”, “Overtravel”
“Creep” or “travel” is the distance the trigger moves between the end of take-up and when the trigger breaks to fire the fun. Too much creep can affect accuracy, but no creep can be unsafe, as the shooter may not be prepared to fire. “Stacking” occurs when the trigger weight actually increases during travel — this shouldn’t happen. Lastly, “overtravel” is the distance the trigger continues moving back after the gun fires.
This article is based on a longer story in the NRA Blog.
Want to see new-born Pandas? No, not the furry kind — rather Stolle Panda actions produced with state-of-the-art CNC machinery. If you’ve ever wondered how precision benchrest, long-range, and tactical rifles are built, check out video from Kelbly’s. You’ll see actions finished, barrels chambered and crowned, pillars installed in stocks, barreled actions bedded, plus a host of other services performed by Kelbly’s gunsmiths and machinists.
If you’re a fan of fine machine-work, this video should be both informative and entertaining. You can see how precision gun work is done with 21st-Century technology. Tip of the hat to Ian Kelbly and crew for producing this excellent video visit to the Kelbly’s production center.
Click Volume Control to Activate Sound for Kelbly’s Video:
This handy cleaning mat features a parts diagram for AR-platform rifles. This padded, absorbent 36″ x 12″ AR15 mat costs $18.99 at Amazon.
With a large percentage of Americans stuck at home under Coronavirus lockdown orders, there is time to attend to many maintenance tasks — including cleaning your firearms. Here are some quality benchtop pads that can help with the cleaning process for all types of firearms — pistols, rifles, and shotguns.
While we normally use a gun cradle or Caldwell gun vise when cleaning or adjusting our rifles. But there are situations, such as when working on a barreled action, when it’s nice to use a pad that lies flat. Many work pads are too small — they’re nothing more than oversize mouse pads. Here are three gun pads that are big enough to work well with rifles and/or barreled actions.
DryMate Gun Cleaning Pad
The DryMate Gun Cleaning Pad is a full 54″ wide x 16″. That’s four and a half FEET wide — longer than most rifles, so you have plenty of surface area for working. Conveniently, this product can be washed with soap and water. It is offered in three versions: Green, Blaze Orange, and Camo. We like the Blaze orange version because the bright color makes it easier to see small parts such as screws and springs.
Boyt Harness Counter Pad
The 48″ x 12″ Boyt Harness Counter Pad was originally designed more for display purposes than for serious work sessions, but we like this product. It is useful if you want to lay your gun on a bench to make small adjustments. The Boyt Counter Pad is nice and big, a full four feet from end to end. The back side is canvas while the top-size is a quilted cotton fabric.
Owner Reviews — This product has received high praise from buyers. Here are actual owner reviews:
Expensive… but worth every penny. I bought three of them because I want to have at least one always around. I use one for a shooting bench or tailgate mat and another for my primary gun cleaning workbench mat. Awesome for both purposes. This one was perfect for my array of needs. — Joe D.
This mat is great for cleaning guns and keeping your surfaces clear of oil or solvent. The mat has plenty of space for a rifle or handgun and the padding is thick enough[.] I would definitely buy again and have recommended this to my friends and family. — Safety Guy
I bring this to the rifle range with me every time, to rest my rifle on the table without worrying about scratches. It fits nicely in my soft rifle case. One side is a tough canvas material that doesn’t show scratches, and the other side is a soft fleece material that protects the finish of your gun. — MACPSU
Hoppes Gun Cleaning Pad
The Hoppes Gun Cleaning Pad is 36″ wide x 12″. That’s big enough for many barreled actions (unless you have a really long barrel). This pad has a non-slip nylon backing, and Hoppes claims that the “Soft acrylic material absorbs 8 times its weight in fluids.” This Hoppes Cleaning Pad is very affordable. It costs just $8.15 at Amazon.com with free shipping for Prime members.
Handy Cleaning Cradles from PMA Tool — Single or Double
For those tasks were a pad is not convenient, PMA Tool offers lightweight yet sturdy cleaning cradles that are handy, affordable, and easy to transport. PMA’s single-gun cradle, starting at $75.95, is ideal for benchrest rigs. It measures about 17″ in length and weighs about one pound. PMA also offers an excellent two-gun cradle for $119.95. Both single and double cradles secure your rifle(s) in a muzzle-down position that allows easy cleaning and prevents solvents from running back into the action. The front “saddle” and all contact surfaces are covered by thick silicone rubber padding which grips the rifle securely yet protects the stock and components from scratches.
AccurateShooter.com will offer a new FREE service for Forum members and readers — Barrel Break-In. Knowledgeable shooters know that it can take 150 rounds or more for a barrel to achieve peak accuracy during Phase I of break-in. Then you want to do a lengthy Phase II break-in process to smooth the lands and grooves for reduced bullet drag and maximum velocity potential. Overall, the optimal barrel break-in schedule encompasses 500 to 700 rounds of careful firing under match conditions with a precise, cleaning regimen between each shooting cycle.
Very few gun owners have the time (or money) to do a full 500-round barrel break-in. The cost in bullets and powder is significant, not to mention time spent at the range. Thankfully AccurateShooter.com’s talented team of shooters will take that burden off you. You send us those brand new high-dollar match barrels — we do the work, using those barrels in our matches and varmint shoots, all the while carrying out the critical Phase I and II barrel break-in processes start to finish.
Barrel Break-In Carried Out By Champion Shooters
Our barrel break-in procedure is done by some of the nation’s top shooters. Here is AccurateShooter System Admin Jay Christopherson performing barrel break-in on a customer’s barrel during a competition. Jay won the F-Open Division at the 2020 Berger SW Nationals. Put your brand new match barrel in the hands of champions, to have it broken in the right way!
To participate in the Accurate Shooter Barrel Break-In Program (ASBBIP), just send us your chambered Krieger, Bartlein, Brux, Lilja, Douglas or other custom barrel and our testers will shoot it for six months, dutifully logging how the accuracy improves as the careful break-in process takes place over time. We guarantee that when you get your barrel barrel back, it will be thoroughly broken-in and ready to use. Enjoy peak accuracy for many hundreds of rounds! Then you can send us a new chambered barrel and we can do the tedious barrel break-in process for you again. Just pay for the shipping — we do the rest!
NOTE: Program limited to premium match barrels of approved calibers/chamberings and contours. Barrels must be chambered for one of the BAT, Borden, Kelbly, Defiance, and Barnard custom actions used by our shooting team. We reserve the right to retain the barrels for use in Nationals-level shooting matches.
Due to the COVID-19 Pandemic, many of our readers are dusting off their AR-platform rifles. Because ARs have a somewhat unique (and dirty) semi-auto operating system, we think all AR owners should learn how their rifles operate — from the inside out. This Sunday GunDay feature provides an “inside look” at the AR, with X-Ray and Cutaway views created through advanced 3D computer modeling.
AR15 Functions Revealed with 3D Computer Animation
Ever wondered how the parts inside an AR15 work together? Just exactly how does the reciprocating bolt carrier feed rounds from the magazine? How do the elements in the trigger group work and reset after each shot? How does the gas system bleed gas from the barrel and operate the bolt carrier? These and other questions are answered in this eye-opening video from 45Snipers. Using “cutaway” 3D computer animation, this 5-minute video shows all features of an AR15 inside and out. This fascinating firearms animation allows the viewer to look inside the upper and lower receivers, into the bolt carrier, chamber, barrel, and magazine.
This video starts off slow and has annoying background music, but it is well worth watching if you own or shoot any AR-platform rifle. It illustrates all the key operations during the charging, loading, firing, and ejection processes. The cutaway animation shows how rounds are stripped from the magazine and then chambered. It then shows how every part of the trigger group works, and how the firing pin strikes the primer. You can even watch the bullet move down the barrel before the empty shell casing is removed from the chamber and tossed out the ejection port. Here are sample frames from the video:
How AR-Platform Rifles Work — General Introduction
To help reader understand the general operation of AR-type rifles, this video shows the control functions of an AR and how the upper and lower sections work together.
Cutaway 3D Animation of AR15/M16 Action — Watch Video
Here is an excellent “cutaway” animation by Thomas Schwenke that shows how an AR-15 functions — how the entire loading cycle works from start to finish.
AR platform rifles are semi-automatics version of the M16. These feature distinctive upper and lower receivers which can be readily separated via front and rear pins. The upper includes the barrel, handguard, forward gas tube, and bolt assembly, while the lower contains grip, trigger group, fire selector, and mag well. In addition the lower is attached to the stock which encloses the buffer assembly.
The original ArmaLite AR-15 was a select-fire, air-cooled, gas-operated, magazine-fed rifle designed by American gun manufacturer ArmaLite in 1956. It was based on Armalite’s AR-10 rifle chambered for the 7.62×51 NATO (.308 Win). In 1959, ArmaLite sold its rights to the AR-10 and AR-15 to Colt. Some key modifications were made — most notably, the charging handle was re-located from under the carrying handle to the rear of the receiver. The redesigned rifle was adopted by the U.S. military as the M16 carbine, which went into production in March 1964.
The day we planned to shoot prairie dogs was windy, so we headed to public land nearby and set up steel to get ballistics drop info and simply to play at distance. We had 5″ steel at 220 yards, 10″ steel (diamond) at 510 yards, and 10″ steel (square) at 650 yards. Wind was from 8 mph to just over 20 mph, so the little 123 grainer was getting tossed about, while keeping us humble all at the same time. Regardless of the gusty winds, I considered the session a success!
Great Results with Varget + 77gr Sierra TMKs
The 
