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August 14th, 2014

Thumbhole F-Class Stock by Carl Bernosky

Carl Bernosky Thumbhole Laminate F-Class Barnard Rifle Stock long range adjustable cheekpieceMost of you know Carl Bernosky as a great marksman and 10-time National High Power Champion. But you may not realize that Carl is also a superb stock-maker. A true craftsman, Carl produces outstanding laminated and fancy wood stocks for hunters and competitive shooters. Visit CarlBernosky.com to see a selection of Carl’s competition and hunting stocks.

One of Carl’s latest creations is a thumbhole F-Class stock. Designed for F-Open shooters, this stock features a flat, 3″-wide fore-end, ergonomic grip, and adjustable cheekpiece. The laminated Bernosky stock featured here was crafted for Chesebro Rifles, which offers a turn-key stock package for the Barnard ‘P’ action, one of our favorite custom actions. This particular build features a MT Guns Vee Block Bedding System, MT Guns 3-Way Adjustable Butt Plate, and B&D Precision removable cheek piece.

Click Photo to view full-size image of stock.
Carl Bernosky Thumbhole Laminate F-Class Barnard Rifle Stock long range adjustable cheekpiece

Carl Bernosky Thumbhole Laminate F-Class Barnard Rifle Stock long range adjustable cheekpiece

As you see it, complete with all hardware (including short fore-end rail for bipod) this stock runs $1275.00 ready to ship. Just attach your Barnard barreled action and you’re ready to compete. The stock (by itself) weighs 6.5 pounds. Contact Chesebro Rifles, (661) 557-2442, for more information.

Cheek-piece close-up shows high-quality adjustment hardware.
Carl Bernosky Thumbhole Laminate F-Class Barnard Rifle Stock long range adjustable cheekpiece

Cheek-piece is relieved to allow full bolt travel.
Carl Bernosky Thumbhole Laminate F-Class Barnard Rifle Stock long range adjustable cheekpiece

Short accessory rail on the underside of the fore-end can be used to mount bipod.
Carl Bernosky Thumbhole Laminate F-Class Barnard Rifle Stock long range adjustable cheekpiece

Stock tip from EdLongrange. We welcome reader submissions.
Permalink Gunsmithing, New Product 4 Comments »
August 5th, 2014

Gun Tech: Pads for Cleaning and Working on Your Rifles

We normally use a gun cradle 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
rifle Gun cleaning pad drymateThe 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.

rifle Gun cleaning pad drymate

rifle Gun cleaning pad drymate

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. This product has received high praise from buyers. Here are actual owner reviews:

rifle Gun cleaning pad drymate

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 $8.39 at Amazon.com with free shipping for Prime members.

rifle Gun cleaning pad drymate
Permalink Gear Review, Gunsmithing No Comments »
August 2nd, 2014

How Brux Barrels are Made — Precision Start to Finish

Brux Barrels, based in Lodi, Wisconsin, has earned a reputation for producing great-shooting tubes. Brux-made barrels have won their fair share of matches, and set some notable records in the process. Last year, Rodney Wagner shot the smallest five-shot, 600-yard group (.0349″) in the history of rifle competition, using a Brux barrel chambered for the 6mm Dasher.

Folks often ask us why Brux barrels shoot so well. “What’s the secret?” they ask. We can only answer with what Brux explains on its own website: “To make a cut-rifled barrel you have to start off with the proper ingredients: the best steel available, skill, and experience. Since there are really only two main suppliers of barrel-quality steel, the skill and experience is what really makes a barrel maker stand out.” Here is how Brux’s co-owners, Norman Brux and Ken Liebetrau, explain all the procedures involved in making a Brux cut-rifled barrel:

Brux Barrel-Making Process, Start to Finish

We start out with either 4150 chrome-moly or 416R stainless steel double stress-relieved bar stock. The bar stock starts out at 1-9/32″ in diameter and 20-24 feet long so we cut it to length.

Step two is to rough-contour the outside of the barrel blank in a lathe.

Thirdly, the blank gets mounted into a Barnes gun drill. The cutter bit has holes through which oil or coolant is injected under pressure to allow the evacuation of chips formed during the cutting process. This is called “oil-through” or “coolant-through”. Without this, you wouldn’t want to even attempt drilling a hole 30” long and under ¼” in diameter. The combination of a 3600rpm and good flushing allows us to drill a beautifully straight and centered hole .005” under “land” diameter at a rate of 1” per minute.

Clean the barrel.

Next the blank is sent back to the lathe to machine the finished contour of the outside.

Clean the barrel again.

Now, the blank is sent on to the Pratt & Whitney reamer in which an “oil through” reaming tool is used to cut away the extra .005” left in the drilling process. The reamer makes an extremely accurate bore size and after it is finished the bore will have a better surface finish and will be at the proper “land” diameter.

Clean the barrel again.

In the sixth step we hand lap each barrel to remove any slight tool marks that may have been left by the reamer and inspect every one with a bore scope. If the barrel doesn’t meet our standards for surface finish and tolerance it doesn’t get any further.

Clean the barrel again.

The barrels then go onto the rifling machine which is responsible for cutting the all so familiar grooves in the bore. A caliber/land configuration-specific rifling head is used to progressively shave away small amounts of steel to form the rifling grooves. This is accomplished by simultaneously pulling the rifling head through the reamed blank as the blank is spun at a controlled rate. After each cut, the blank is rotated 90 degrees (for a four-land configuration) and after one full rotation (360 degrees) the rifling head is slightly raised to shave off the next bit of material. This process is repeated until we reach groove diameter.

Clean the barrel again.

Lastly, the barrel is hand-lapped again (to ensure a smooth bore), and a final inspection is performed with the bore scope.

The barrel is cleaned one last time, wrapped, packed, and shipped to [the customer].

Anyone reading this detailed description of the Brux barrel-making process will doubtless come away with a new appreciation for the time, effort, and dedication required to produce a premium match-grade cut-rifled barrel. Obviously, there are no easy shortcuts and great attention to detail is required each step of the way. As shooters we’re lucky that we have barrel-makers so dedicated to their craft.

Credit James Mock for steering us to this Barrel Making 101 feature on the Brux website.

Permalink - Articles, Gunsmithing 8 Comments »
August 1st, 2014

Wow Factor: Seb’s Wood and Aluminum F-Class Stock

We first featured this amazing stock last year. We felt this creation was such a stunning piece of work that it deserved a second look. If you missed this masterpiece the first time around, feast your eyes…

Sebastian (“Seb”) Lambang, creator of the SEB Coaxial Rests and the Coaxial Joystick Bipod, has engineered an impressive new wood and aluminum F-Class stock. The stock features a long, box-section aluminum fore-end with a wood rear section and wood-trimmed “wings” on the front bag-rider. The aluminum fore-arm has “buick vents” for weight reduction. From the end of the action rearward, the stock is mostly wood, with light and dark fancy wood laminates on opposite sides (left and right).

Accurateshooter.com Seb Lambang F-Class wood aluminum stock bag rider

Accurateshooter.com Seb Lambang F-Class wood aluminum stock bag rider

The foot of the buttstock has a very wide aluminum rear bag-rider with rails. The rear wood section appears to be two solid pieces of wood — but that is deceiving. Seb explains: “To save weight, the buttstock is hollow (using thin-walled wood)”. To strengthen the construction, Seb added carbon fiber inside the buttstock. So what you see is a wood outer shell with carbon fiber layers on the inside. The stock sports vertically-adjustable cheek-piece and buttplate. The thick, rubber buttpad should diminish felt recoil even when shooting big cartridges with heavy bullets.

Accurateshooter.com Seb Lambang F-Class wood aluminum stock bag rider

Accurateshooter.com Seb Lambang F-Class wood aluminum stock bag rider

Accurateshooter.com Seb Lambang F-Class wood aluminum stock bag rider

This is an interesting, innovative stock design. And as with everything Seb produces, the craftsmanship, fit and finish are superb. We may get a chance to see how well this new stock shoots at the F-Class World Championships later this month in Raton, New Mexico.

Seb also crafted a handsome set of angled scope rails with beautifully-machined scope rings. Imagine being able to custom-make one-off products of this quality in your own machine shop!

Accurateshooter.com Seb Lambang F-Class wood aluminum stock bag rider

Permalink Gunsmithing 4 Comments »
July 29th, 2014

F-TR Champ’s Secret Weapon — 40X Rimfire F-TR Trainer

2014 and 2012 U.S. National F-TR Champion James Crofts is one of America’s top F-Class shooters. A member of the 2013 World Championship-winning F-TR Team USA squad, James knows a thing or two about long-range shooting, that’s for sure. But you may be surprised to learn how James sharpens his shooting skills at relatively short distances. You see, James often practices with a .22 LR rimfire rifle at distances from 50 to 200 yards. James tells us: “Shooting my F-Class rimfire trainer saves me money and improves my shot process and wind-reading abilities.”

Remington rimfire 40X barreled action in PR&T LowBoy stock with PT&G bolt.
James Crofts F-TR Rimfire .22 LR

Rimfire Training Teaches Wind-Reading Skills by James Crofts
Training with the rimfire is extremely useful and can be done from 25 yards out to 200 yards. I am lucky and can shoot 50 yards right off my back deck. That is far enough that any miscue on rifle handling will show up on the target. I use a two dry-fire to one actual shot routine for my practices. This gives me much more positive reinforcement without any negative reinforcement.

Wind reading is extremely important with a .22 LR rifle. I use a set of smallbore flags to aid my wind calls. The smallbore flags are a must and force you to look at the flags and mirage on each and every shot. If you think the flags at Camp Butner move a lot, try smallbore flags around tall pine trees.

Rimfire Training Is Cost-Effective
Rimfire ammunition is much less costly than centerfire ammo. Though .22 LR prices have risen in recent years (and rimfire ammo is harder to find), even now I can get a 500-round brick of .22 LR ammo for less than $75.00. That works out to fifteen cents a round. That’s a fraction of the cost of handloading .308 Win match ammo. Heck, you can pay 40 cents a piece for match-grade .308-cal centerfire bullets. Then you have to figure in brass, primers, and powder.

James Crofts F-TR Rimfire .22 LR

My CMP 40X Rimfire F-TR LowBoy Clone
My quest into the .22 LLR rimfire field started with an email from the Civilian Marksmanship Program (CMP) announcing Rem 40X stripped barreled actions for sale. I thought, “Hmmm… Could one of those little 40X barreled actions be turned into a F-Class training rifle?” My gunsmith Ray Bowman of Precision Rifle & Tool was brought in at this point.

After conferring with Ray, it was decided that he could indeed turn this into a F-Class training rifle. Ray contacted Dave Kiff of PT&G and ordered a new bolt for the Remington 40X rimfire action. Next was the stock decision. I decided to go with a PR&T Low Boy F-Class stock — this is an exact clone of the stock for my .308 Win F-TR competition rifle. Then a Jewell trigger was acquired to complete the components. Ray built this just like he would any custom rifle, other than using the stock barrel. The project turned out awesome. The rifle was a hammer from the beginning even with the stock barrel.

James Crofts F-TR Rimfire .22 LR


About James Crofts
This spring, James Crofts was chosen as the new Vice Captain for the USA F-TR National Team. James comes from a military background, having served 20 years in the U.S. Navy aboard fast attack submarines. James has also been a shooting member of the 8-man F-TR Team USA, and he is always one of the top shooters in any F-TR competition. James told us: “Now the work begins, but with Ray Gross as Captain I think we can handle it. It will be a tough act to follow. Darrell Buell and Mike Miller set the bar extremely high with back-to-back world championship gold medals.”

James Crofts F-TR Rimfire .22 LR
James Crofts — Photo by Kent Reeve.

Permalink Competition, Gunsmithing No Comments »
July 27th, 2014

Bastogne Beauty — F-Classer from Master Class Stocks

Alex Sitman Master Class StocksAlex Sitman of Master Class Stocks in Pennsylvania is widely considered one of the finest rifle-stock craftsmen in the country, if not the world. Alex’s workmanship and dedication to excellence is top-of-the-line. Alex normally custom-fits each stock to his customer precisely. Many hours are dedicated to stock prep and inletting, and his bedding jobs are flawless. Each stock is exactingly hand-crafted with great attention to detail, and then the stock is “dressed” in the customer’s choice of finishes.

Doing all that takes time — a lot of time. That’s why Master Class Stocks has a long waiting list, and it can take months before a big job is completed. But when Alex is involved, you can count on the final product being a work of stock-making art. Here’s an example. Alex recently stocked an F-Class rifle using eye-popping, exhibition-grade Bastogne walnut. The wood was sourced from Cecil Fredi of GunstockBlanks.com. Alex says: “Cecil’s wood is some of the best I’ve ever used. This blank cost over $1000.00, but it was truly spectacular.” Since the blank was less than 3″ wide, Alex (with assistance from 8-time NRA High Power Champion Carl Bernosky) laminated on the 3″-wide forearm “wings” using spare wood left after the blank was cut. See how Alex and Carl carefully matched the grain of the wood on the forearm. And note how perfectly the adjustable cheek-piece is fitted. If you want a stock like this on your next rifle, contact Alex Sitman at Master Class Stocks, (814) 742-7868.

The Bastogne Beauty — More Construction Details
Eric Kennard tells us: “This rifle was built for Mike Dana in Florida. Kelbly’s did the metal work. [The action is a Stolle Panda F-Class.] Barrel by Brux. Chambering? 6mmBR of course! Mike added a March 10 x 60 scope. Let me tell you this is beyond a work of art! The fit is absolutely perfect! There is not one flaw in the wood-work. The pillar bedding is also perfect! Did you notice the ebony inserts? Or Alex’s custom trigger guard? Alex out did-himself this time. Most of us would not dare to shoot [this gun]!”

Permalink Gunsmithing 9 Comments »
July 26th, 2014

Jerry Miculek Shoots Original, Full-Auto AR-10 from the Fifties

Today, AR-platform rifles are hugely popular. Dozens of manufacturers sell AR-type rifles, in a wide variety of configurations and calibers. But before there were M16s and AR-15s, ArmaLite produced a 7.62×51 caliber rifle, the AR-10. Invented by Eugene (‘Gene’) Stoner for the Armalite company, this is the father of all of today’s AR-platform rifles.

If you’re curious about the AR-10, in this video, Jerry Miculek puts an original 1957-vintage AR-10 through its paces on the range. This extremely rare, early-production rifle was provided by Mr. Reed Knight and the Institute of Military Technology. (The gun in the video was actually produced in the Netherlands under license, see video at 4:40.) This AR-10 is the direct ancestor of the AR-15, M16, and many of the modern sporting rifles that we use today.

The AR-10 was slim and light, weighing in at around 7 pounds. Some folks might argue that the original “old-school” AR10 is actually better that some of today’s heavy, gadget-laden ARs. The AR-10’s charging “lever” was under the carry handle — that made it easier to manipulate with the gun raised in a firing position.

AR-10 Armalite Jerry Miculek

You’ll notice there is no “forward assist”. Inventor Gene Stoner did not believe a separate “bolt-pusher” was necessary. The forward assist was added to solve problems encountered in Viet Nam. Some critics say the forward assist “only takes a small problem and makes it a big problem.” For today’s competition ARs (that are never dragged through the mud) the forward assist probably is superfluous. It is rarely if ever needed.

AR-10 Armalite Jerry Miculek

Note also that the handguards are fairly slim and tapered. Today, six decades after the first AR-10 prototypes, we are now seeing these kind of slim handguards (made from aluminum or lightweight composites) used on “full race” ARs campaigned in 3-gun competition.

AR-10 Armalite Jerry Miculek

History of the AR-10
The AR-10 is a 7.62 mm battle rifle developed by Eugene Stoner in the late 1950s at ArmaLite, then a division of the Fairchild Aircraft Corporation. When first introduced in 1956, the AR-10 used an innovative straight-line barrel/stock design with phenolic composite and forged alloy parts resulting in a small arm significantly easier to control in automatic fire and over one pound lighter than other infantry rifles of the day. Over its production life, the original AR-10 was built in relatively small numbers, with fewer than 9,900 rifles assembled.

In 1957, the basic AR-10 design was substantially modified by ArmaLite to accommodate the .223 Remington cartridge, and given the designation AR-15. ArmaLite licensed the AR-10 and AR-15 designs to Colt Firearms. The AR-15 eventually became the M16 rifle.

AR-10 photos from Arms Izarra, a Spanish company specializing in de-militarized, collectible firearms. Interestingly, this particular AR-10 was produced in the Netherlands under license.

Permalink - Videos, Gunsmithing 1 Comment »
July 21st, 2014

Muzzle Brake Performance Tests by Bertalotto

Muzzle brakes are controversial. Some people swear by them, while others swear at them. Still, there’s no question that a good brake can reduce felt recoil up to 45%. And likewise, the best brakes, when installed properly, seem to have no negative effect on accuracy.

VAIS muzzle brake

Roy Bertalotto has done considerable experimentation with muzzle brakes, testing dozens of brake designs on his own rifles over the past few years. Roy’s article, Adventures with Muzzle Brakes, discusses various aspects of muzzle brake design and performance. Roy doesn’t claim that his testing is definitive, but his article is definitely worth a read. Here are some of Roy’s interesting findings:

Exit Hole Diameter
“Best accuracy and effectiveness of the brake was obtained with a hole .020″ over bullet diameter. If the exit hole is too small, such as +.005″ over bullet diameter, accuracy suffers. If the depth of the exit hole is too shallow, the metal around the hole will erode very quickly.”

Hole Placement
“The most effective braking was with a brake 1″ in diameter with a 3/4″ exit hole on each side, just in front of the muzzle. The bullet passes through a cone of 35 degrees before it exits the brake. (Like the tank example), Incredible reduction of recoil. But loud and ugly. Very easy to make since you don’t need a spin fixture or a dividing head.”

Bottom Gas Venting Helps Accuracy
“In my tests, not having holes all around the brake effects accuracy a bit. I believe it does something to the bullet by the air pushed ahead of the bullet creating unequal turbulence in the bullet path. I’ve tried a few brakes where I drilled only holes on the top, test fired, and then completed holes on the bottom and in every case, accuracy improved.” Below are spiral-ported brakes crafted by Clay Spencer.

VAIS muzzle brake

Brakes Work Best with High-Pressure Cartridges
“The higher the pressure of the particular round, the more effective the brake. I have over 20 rifles with brakes. The 220 Swift is the king of reduction. Followed very closely by the 25-06, 6mm Remington, any Weatherby small bore. With a proper brake and a hot handload under a 40 gr bullet, the Swift will move 1/2″ to the rear and 0 muzzle rise! Big boomers with low pressure like 45-70s and shot guns benefit the least.” [Editor’s Note: Roy is judging effectiveness by the percentage of recoil reduction rather than absolute levels of recoil. Obviously if you start with a heavier-recoiling round, the absolute amount of recoil energy reduction is greater. Roy is really talking about efficiency–brakes are most efficient when used with high-pressure cartridges.]

Installation is Key to Accuracy
Roy’s findings are fascinating and suggest that further study of muzzle brakes is warranted. But we can all agree that precision installation of the brake is essential for accuracy. A poorly-installed, mis-aligned brake will degrade accuracy, that is well-known.

Harrell’s Precision has made thousands of muzzle brakes, in many styles and port arrangements. The Harrell brothers offer some good advice for gunsmiths installing brakes: “Muzzle brakes aren’t magic, they reduce recoil by redirecting exiting gas. What’s important is that they are straight and the threads are perpendicular with the base. The only way to get the base and threads perpendicular is to thread, not tap, them on a lathe.”

Permalink Gunsmithing, Tech Tip 9 Comments »
July 20th, 2014

Tech Tip: Blue-Printing Triggers

gunsmithing Speedy Thomas Gonzalez triggerTrigger Blue-Printing — Why It Can Be Important
by Thomas “Speedy” Gonzalez

To Blueprint or Not? That is the Question.
I often get asked is it really necessary to blueprint a custom match trigger. “Abolutely” is my answer. Here is an example that demonstrates why. After I completed a recent rifle project, the gun’s owner and I took the rifle to the range to break-in the barrel. But we quickly noticed a problem. The owner Alex L’s first statement was: “This trigger sucks — better blueprint it when you get back.”

Not only did the trigger feel rough and scratchy, but it failed to hold the cocking piece 2 out of 10 times when cocking the rifle for the next shot. Not good.

No matter what we tried at the range, the problem persisted. As soon as we returned from the range, I had to take the trigger apart to solve the mystery.

As soon as I opened her up on the operating table it was evident to me where the problem was. I have only seen the inside of about 3000 of these rascals and the head of the Over-Travel Screw stuck out like a sore thumb. The head of the Over-Travel Screw was nearly twice as thick as its other brothers and sisters. This caused the relationship between travel adjustment and sear engagement to be nearly impossible to adjust. And that, in turn, created a serious safety issue.

To remedy the situation, I replaced the screw with [another screw with] standard head thickness and ALL PROBLEMS DISAPPEARED… Amazing! Had I blue-printed this trigger before going to shoot, this never would have happened.

gunsmithing Speedy Thomas Gonzalez triggergunsmithing Speedy Thomas Gonzalez trigger

So, should one blueprint a trigger? I say “Hell yeah” if you are serious about competiting and winning. Otherwise be prepared for the worst. — Speedy

Permalink Gunsmithing 7 Comments »
July 17th, 2014

Gary Eliseo Moves Competition Machine Inc. to Arizona

Gary Eliseo Competition Machine tubegun Chassis Arizona California

Yet another important gun-related company has left California for a more business-friendly location. Gary Eliseo’s Competition Machine Inc., producer of rifle chassis systems, has moved operations to Northern Arizona. A large, new Arizona facility has been secured, and Gary’s team is busy putting the production machinery in place and organizing supplies and inventory.

Gary Eliseo Competition Machine tubegun Chassis Arizona California

Gary Eliseo Competition Machine tubegun Chassis Arizona CaliforniaRifle Chassis Builder Moves to Arizona
Gary Eliseo announced: “It’s official, after 24 years of dealing with the difficult business environment in California, we’re relocating to Northern Arizona. To our friends and customers we ask for your patience during this monumental task. Our new shop will be larger and more efficient which will allow us to better serve your needs. We have some exciting new products planned in the future that we were simply not able to pursue in California.”

Gary is happy about his new digs in Arizona. His new Arizona facility is much bigger: “The new shop is over twice the size of the old one (3600 square feet vs. 1500 square feet). The added space which will let me open a new rifle division. We’ll update the Competition Machine website soon with the new contact information.” — Gary Eliseo

Gary Eliseo Competition Machine tubegun Chassis Arizona California

Here’s a photo of the new facility on “move-in” day. Gary says: “This is just an empty shell, but it’s soon to be a very busy place. There is so much more opportunity for us here than in California. Also, this Northern Arizona area is crazy beautiful, I think I’m gonna like it!”

Gary Eliseo Competition Machine tubegun Chassis Arizona California

Highway Photo by Wing-Chi Poon, Wiki Creative Commons License.

Permalink Gunsmithing, News 10 Comments »
July 9th, 2014

Problems with “Do-It-Yourself” AR-15s

Commentary by Robert Whitley
In recent years several major firearms component suppliers have promoted the idea of the “do-it-yourself” AR-15 build up. In one sense this is a good thing because it promotes peoples’ education and understanding of firearms, but the down side of this is some folks are assembling and modifying AR-15s without an understanding of the rifle and without the necessary skills and tools to do things properly. The net result of this “do-it-yourself” work can be an AR-15 that is non-functional, problematic or dangerous. Here are two examples of common issues with “do-it-yourself” modifications.

Opening Up the Ejection Port
One common modification for AR-15’s is the opening up of the ejection port. This is typically done to permit more room for ejection or loading of the rifle, and it is also typically done in conjunction with a side charging handle modification.

AR-15 Buffer installation

A common issue I have seen with this modification is that the person opening up the port removes the upper right hand carrier support and riding surface. The net result of this is that the carrier sits loose in the upper receiver when the bolt is in lock-up and this can have very detrimental effects on the function and accuracy of the AR-15. Below are more pictures of one that I saw recently.

Click Arrows to See all FOUR Pictures

Upper Receiver Harmed by Modification
Caption
Upper Receiver Harmed by Modification
Carrier Crooked Wear
Caption
Carrier Crooked Wear
Receiver Showing Gas Key Hits
Caption
Receiver Showing Gas Key Hits
Gas Key Hitting Receiver
Caption
Gas Key Hitting Receiver

Wrong Buffer Installed
Another common mistake is the use of an improper buffer with the rifle (i.e. like using a carbine buffer in a standard rifle length buffer tube). There are many after market buffers being sold out there, but if the wrong buffer is used with the rifle, it can allow the bolt carrier to cycle too far back so that the rear of the carrier gas key becomes the stop for the carrier (i.e. when it smashes into the upper part of the lower receiver – OUCH!).

AR-15 Buffer installation

We have even seen situations where the gas key is snapped right off the carrier from this, and it completely disables the rifle and can also cause extensive damage to the firearm as well. Unfortunately we have seen this situation far too often and it is clear that a person needs to fully understand how the buffer assembly works if “do-it-yourself” work is going to be done to the buffer assembly, since everything done to the buffer assembly has an effect on the rifle, its function and accuracy.

While I applaud the person who is self-reliant and has a “can do” attitude, the other side of this is when it comes to a firearm, “do-it-yourself” work should only be done when and if one fully understands the rifle and how it functions and how the work will affect the rifle.

Robert Whitley
AR-X Enterprises, LLC
199 North Broad Street
Doylestown, PA 18901
(215) 348-8789
www.6mmAR.com

Permalink Gunsmithing, Tech Tip 5 Comments »
July 8th, 2014

Today’s Hunter Benchrest Rig — Not Your Grandpa’s Deer Rifle

Weaver T-6 6-power scopeIn the short-range benchrest game, most of the attention goes to the 10.5-lb Light Varmint Class, and the 13.5-lb Heavy Varmint Class. But there’s another class that is enjoying increased popularity — Hunter Benchrest. In some ways, Hunter BR is more challenging, because you shoot a 10-pounder with a narrower (2.25″ forearm) and a 6-power scope (both LV and HV allow 3″-wide forearms and high-magnification scopes). It takes skilled gun-handling and careful aim to get the most from a Hunter Benchrest rig.

Stan Ware Wolfpup 30The modern Hunter BR rifle is a far cry from a typical deer rifle, or even a walk-around varminter. Jackie Schmidt explains: “Do not be fooled by that title ‘Hunter Benchrest’, or HBR. The typical HBR Rifle has, like its cousin the Group Rifle, evolved into a very singular-purpose piece of equipment, suited to do one thing very well — namely to shoot Xs in the competitive arena, governed by rather strict sets of rules promulgated by the IBS or the NBRSA.

Hunter Benchrest Rifle Standards
The two defining factors in HBR are the minimum case capacity, and the 6-power scope. Everything else is just window dressing. Can one shoot a real factory gun in Hunter BR Class? YES — IF your factory rifle meets these qualifications:

■ Total gun weight no more than 10 pounds.
■ Stock forearm must be convex (at least slightly) on the bottom, and no more than 2.25″ wide.
■ Gun must have magazine capable of holding at least two cartridges. (Normally, however, Hunter BR shooters don’t feed from the magazine.)
■ Gun must shoot cartridge with at least 45 grains of H20 capacity (same as a 30-30).
■ Scope must be a 6-power or capable of being set and used at 6X magnification.

If you go to the IBS website, you will see that there are a couple of exceptions, but in the end, to compete for the prize, you must have a legal Hunter BR rifle. But even if you’re not completely within the rules, most match directors will let a newcomer shoot along, for the fun of it, and to see what the game is really all about.”

Top Hunter BR shooter Al Nyhus tells us: “As Jackie has pointed out, the Hunter class in Benchrest has mutated into full race BR rigs…much like NASCAR ‘stock cars’ or NHRA ‘Pro Stock’. The original intent of Hunter was for a class where the average person with an interest in accuracy could bring a good shooting hunting rifle and give BR a try. Still a darn good idea, to me.

Hunter Benchrest Rig Chambered for the .30 Wolfpup
Here are photos of my Hunter Benchrest rig, which is pretty typical of what’s being used at this point in time. My Hunter BR rig is pretty standard stuff except for the chambering. It features a Stolle R/L Kodiak action tweaked a bit by Stan Ware, Kostyshyn 1:17 four groove, chambered for Stan Ware’s 30 WolfPup (30BR .240″ long/.085″ neck length). The photo below shows a Leupold 6X scope but I’ve been using a Sightron 6X lately.

Nyhus Hunter Benchrest

This stock is an old Speedy/McMillan pattern HBR stock. I had it dipped (externally coated) with a carbon fiber pattern. By the rules, Hunter rifles cannot be glue-ins, so pillar-bedding is the norm. I guess the forearm is about as ‘convex’ on the bottom as any other stock currently in use. This is another area where the guns have evolved and the rulebook(s) haven’t exactly kept pace with the current state of what’s being used.”

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