Some custom barrel makers are now honing barrels (after drilling) to improve bore diameter uniformity, smooth the interior finish, and reduce barrel lapping times. For years, large-scale manufacturers of hammer-forged barrels have employed honing. Now the process is being used by smaller, “boutique” barrel-makers. This article explains how and why barrel honing is done. Take the time to watch the video. For anyone with an interest in barrel-making, this video is an eye-opener…
Barrel Honing Process Demonstrated (Worth Watching!):
For custom barrel makers, honing is a time-saver and cost cutter. A few minutes on a honing machine can cut lapping times in half, leaving a cross-hatched surface finish in single or low double-digit Ra. Honing is the same process used to make diesel fuel injectors with bore roundness and straightness controlled to fractions of a micron (<0.000040″), with surface finish Ra ≤0.15 µm (6 µin).
A key manufacturing process used for hammer-forged barrels is now getting attention from the makers of custom button-rifled barrels. This process is precision bore-honing. Honing produces a high-quality bore surface fast, which is critical to hammer forging. (Why is honing so important with hammer forging? Surface finish is the one feature of the barrel that cannot be controlled in hammer forging. Surface imperfections in a barrel blank tend to be amplified as the blank is formed on the rifling mandrel. And if the bore is chromed afterwards, imperfections in the surface finish become even more obvious.)
Honing dramatically improves bore diameter size uniformity and accuracy, surface finish and roundness throughout the length of the barrel. It can certainly be used in place of a pre-rifling lap. The chief difference between a lapped and honed bore is the direction of the finish lines in the bore. Honing leaves fine spiraling crosshatch lines, while a lap leaves lines going longitudinally in the bore. After rifling the manufacturer can remove the crosshatch finish with a quick lap if desired. Honing is fast, accurate, and can be automated. Its surface quality and geometry can duplicate lapping, except for the longitudinal lines of the lapped finish.
Frank Green of Bartlein Barrels told us: “We worked with Sunnen and we did all the initial testing on the prototype machine for them. The machine works great! We ordered and received last year a new manufactured machine with the changes we wanted on it and we just ordered a second one a month or so ago. Should be here next month.”
Planning a new tactical or hunting rifle project? You may want to consider a Howa barreled action for your new rig. Brownells has a large supply of these well-made Howas in a variety of chamberings, including the popular 6.5 Creedmoor. You can just bolt this barreled action into the chassis system of your choice. These barreled actions start at $359.99 complete with two-stage trigger and magazine. The 6.5 Creedmoor barrelled action with 24″ Heavy Barrel is $449.99 blued, $479.99 blued/threaded, or $546.00 Cerakote Gray. Many other chamberings are carried by Brownells, including: .204 Ruger, .222 Rem, .223 Rem, 22-250, 6.5 Grendel (Mini), 7.62×39 (Mini), .243 Win, 7mm-08, .308 Win, .270 Win, .30-06, 7mm Rem Mag, .300 Win Mag, .338 Win Mag and more.
Watch Unboxing of Howa Barreled Action in Video:
Bolt-In to Chassis Systems
Howa barreled actions are ready to drop into stocks or chassis systems for quick, DIY bolt-action rifle builds. These barreled actions are available in a wide selection of calibers, barrel lengths and profiles in both blued finish and grey Cerakote. Some have threaded muzzles for easy attachment of suppressors or other muzzle devices. Actions have factory-installed two-stage HACT Trigger, and internal 5-round box magazines. Detachable-mag bottom metals and extra magazines are also available. Actions are ready to accept scope bases and rails. Brownells currently has more than 75 versions of Howa barreled actions.
HACT 2-Stage Trigger
One of the best features of the Howa barreled actions is the HACT 2-Stage trigger, which is way better than most factory triggers. Set at around 3 pounds, the HACT can be adjusted to about half that pull weight. This is a very nice trigger system, and we like the 2-Stage pull for field applications. Writing for the Western Outdoor News, WONews.com, Steve Comus field-tested the HACT Trigger: “The take-up on the [HACT] trigger was fast and easy. The crisp, positive release when pressure was put on during the second stage [reminded me] of some of the target rifles I shot through the years.”
Ernie The Gunsmith Replacement Trigger Springs
Ernie Paull from California was an active competition shooter for many years. However, his eyesight has declined so he has turned his attention to providing components for shooters and gunsmiths. Through his Ernie the Gunsmith website, Paull sells a variety of useful products including gun trigger springs, pillar-bedding kits, Accu-Risers, and pillar installation tools. This Bulletin post focuses on Ernie’s trigger springs. Ernie offers springs for a wide variety of rifles: Browning (A-Bolt, A-Bolt 22), CZ (m452), Kimber, Remington (XR100, XCR, 7, 700, 722, 788, 7600 and more), Ruger (77, 77-22, LC6), Tikka (T-3), Weatherby (MK-V), and Winchester (M-70).
Springs start at just $6.95. Ernie also sells springs for the Rem-compatible Shilen Benchrest trigger, as well as Rem 700 ejector springs and trigger alignment springs. For Rem 700 rifles, Paull makes a spring that fits all Remington M-7 and M-700 triggers including the early X Mark-PRO triggers. Ernie says: “On average, installation of his Model-700 spring will reduce factory triggers’ weight of pull by 1½ to 2½ lbs with no other changes. The exact amount of creep, over-travel, and weight of pull are dependent upon the type and amount of tuning accomplished by your gunsmith.”
While there is more to a good trigger job (in most cases) than just a spring swap, you need to have the proper rate spring when adjusting trigger pull weight downwards. NOTE: For safety reasons, we recommend you consult a competent gunsmith before modifying factory triggers.
Why Replacement Springs are Better than Tweaked/Modified Springs
Ernie has observed that some gunsmiths try to lighten trigger pulls by modifying factory springs in questionable ways: “I have worked with gunsmiths in the past who, when the subject turned to trigger springs, preferred to clip them, grind them, heat them, bend them, smash them, or simply back out the weight of pull screw until there was no or almost no pressure on the spring. With any of these methods, you get a spring whose rate is rapidly rising as the trigger is pulled. As the trigger is released, the spring rate rapidly decreases as it approaches full or near-full extension. A more uniform weight of pull will be achieved when the trigger spring is compressed within its normal working range throughout the entire movement of the trigger. In the long run, the benefits of saved time, plus more uniform and reliable results, will more than offset the cost of these [replacement] springs. If you want a lighter trigger pull, you need a lighter trigger spring.”
Even seen an integrally suppressed rifle? Ruger offers this technology with its new Silent-SR ISB, a multi-baffle integrally suppressed barrel (ISB) for Ruger 10/22 takedown models. This system reduces sound levels to an average of 113.2 dB with standard velocity ammunition. That’s very impressive — consider that an unsuppressed .22 LR firearm can produce noise levels as high as 140 dB with standard velocity ammunition. That’s well above the threshold where irreversible hearing damage begins. (Source: NC Silencers).
Even if you are not interested in a suppressed rimfire rifle (or live in a state where suppressors are forbidden) we think you’ll be interested in Ruger’s technology. The Silent-SR employs a long, multi-element “baffle stack” that can be easily removed for cleaning.
Watch Integrally Suppressed Barrel in Action. CLICK HERE to View Video on Ruger Site. Scroll to bottom of Ruger page after jump!
Here’s what Ruger says about its new ISB (Integrally Suppressed Barrel) for the 10/22 Take-down:
The Silent-SR ISB quickly and easily assembles to any Ruger 10/22 Takedown or 22 Charger Takedown, and features an induction-hardened breech with cold hammer-forged barrel that provide easy takedown and accurate return-to-zero.
Reducing sound pressure levels of .22 LR to an average of 113.2 dB with standard velocity ammunition, a 10/22 Takedown rifle equipped with the Silent-SR ISB is as quiet as a bolt-action rifle with a thread-on silencer. The relatively long barrel of the Silent-SR ISB (compared to other integral suppressors) means the bullet generates energy near that of a 16″ gun for consistent, accurate and effective performance on target. The pushed-cone baffle geometry has been stretched to utilize the volume under the barrel maximizing suppression of the gunshot without disturbing the travel of the bullet.
Disassembly for cleaning is as simple as separating the barrel from your firearm and loosening the Silent-SR ISB’s single assembly screw using the included 5/32″ hex key tool. Once loose, pull the screw to remove all six 17-4 stainless steel baffles, spacer and front cap free of the sleeve for cleaning. The sealed baffles keep the fouling away from the serialized sleeve, yet easily come apart even after thousands of rounds. Finished with Cerakote, the Silent-SR ISB is engineered and built for a lifetime of hard use without clogged ports, seized components or loss of suppression that often plague other integrally suppressed rimfire barrels.
Remington Arms Company celebrated its 200th year in business in 2016. The Remington enterprise was founded in 1816 by Eliphalet Remington in Ilion, New York, as E. Remington and Sons. Remington is America’s oldest gun maker and is still the largest U.S. producer of shotguns and rifles.
This week, Shooting USA TV spotlights Remington, exploring the company’s 200 years of continuous production. The show covers the rich history of Remington Arms Company, and focuses on many of the company’s most noted firearms.
The Shooting USA Hour Airs Tuesdays and Wednesdays on the Outdoor Channel:
Eastern Time:
Tuesday 3:00 PM
Wednesday 9:30 PM, 1:00 AM
Central Time:
Tuesday 2:00 PM
Wednesday 8:30 PM, Midnight
The Founding of a Great Enterprise
Eliphalet Remington II grew up in the countryside of Herkimer County, New York, learning the blacksmith trade. Eliphalet told his father he wanted a gun, so his father told him to build one himself. And, so he did in 1816 with the help of a hired gunsmith to bore and rifle his barrel. Eliphalet then took the finished flintlock to a local shooting match.
“And apparently it was a very successful barrel. His gun shot well,” says Remington Historian Richard Shepler. “So, neighbors, friends said, ‘ could you make me a barrel?’ Over time there was more and more demand.”
By 1828, Eliphalet moved into a factory in Illion, New York. In 1845, he jumped at the opportunity to buy the first of many government contracts. When the Civil War broke out, Remington stayed busy producing firearms. While later in the 1890s during peacetime, Remington manufactured cash registers, sewing machines, knives and even the first successful typewriter. The storied history continues, from the Remington Double Derringer to the Remington Model 700, unquestionably the most successful American sporting rifle.
This stunning flame-painted PPC belongs to Chris from Australia. This rifle features a Stiller Viper action, Speedy (Robertson) BRX stock, and Maddco (Australian) 14-twist barrel chambered in 6PPC.
In our Shooters’ Forum you’ll find a thread in which readers can post photos of their “pride and joy” — their favorite rifle. You’ll find a wide range of guns, from “big boomers” to .17-caliber varminters. Here are some of our favorite entries in the “Pride and Joy” Gallery.
The Bear’s Barbed-Wire Barnard
BarryO, aka ‘the Blue-eyed Bear’, posted his beautiful 6mm Dasher, with its unique barbed wire 3D finish. (There’s a story behind that design.) This rifle was smithed by John King in Montana, with stock bedding work by Leo Anderson. The gun features a Barnard ‘P’ action (with trigger), and 28″ Broughton 5C fluted barrel with VAIS muzzle brake. The Barnard sits in a Tom Manners carbon fiber BR stock decorated with amazing graphics by Mad Shadow Custom Paint.
Sebastian’s Radical Swallowtail 6PPC
Sebastian Lambang is the designer and builder of SEB Coaxial Rests. He’s a smart, creative guy, so you knew when he designed a short-range benchrest stock it would be something special. It needed to be lightweight, yet very rigid. Using “out of the box” thinking, Seb employs a truss-style structure to provide great strength with minimal weight. The rear section is equally radical. There are two splayed “keels” in the rear, forming what this Editor calls a “swallowtail” rear design. Others have called it a “catamaran buttstock.” Below is a side-view of the prototype SEB stock before painting.
Brad’s 6CM Long-Range Match Rifle
Chambered in the 6mm Competition match cartridge, this handsome rig features a Surgeon RSR Action, Bartlein Barrel, and LRB stock. Barrel work was done by Chad Dixon at LongRifles, Inc. and paint by AT Custom Painting.
Varmint Special with Figured Walnut Stock
Here’s a handsome varminter with a beautifully-figured walnut stock. This is one of three rifles Forum Member Dan Hall posted in the Pride and Joy thread.
A Trio of Pealescent Bench Guns
DixiePPC served up not one but THREE pretty bench rigs, all with pearlescent paint jobs. We’d be proud to own three eye-catching rifles like that. Click the image to see a full-screen version.
Zebra-Skinned Match Rifle
And here is Mark Walker’s amazing Zebra-skin BR rifle. With that wild-looking paint job, this rifle turns heads whenever Mark brings it to the range…
A few years back our friend Danny Reever acquired the PMA Action Cleaning tool. He’s now used it for many seasons and it’s still working great. If you shoot a precision rifle, it deserves to have a clean action and lug recess area. This handy tool speeds up the cleaning process, letting you do a more thorough job in less time.
PMA Action Cleaning Tool Kit Review by Danny Reever
I’ve been using the PMA Action Cleaning Tool Kit for quite some time. Previously, I used one of the old style (round knob) Sinclair action-cleaning tools with cylindrical cotton rolls. With the Sinclair tool, I was pretty satisfied that I was getting my actions reasonably clean. But, as I explain below, I think the newer PMA Action Cleaning Tool Kit is easier to use, and possibly achieves better results.
PMA Tool Kit Extensively Tested with Many Action Types
PMA tried a variety of options before finalizing the PMA Action Cleaning Tool Kit. PMA explains that several shooters did a lot of testing “with various sizes of die-cut foam, patches, felts and cotton rolls with various bolt action types (BAT two- and three-Lug, Kelblys, Halls, Remingtons, Winchesters and Savages). [Testers all agreed] that the foam disc is far superior to felts and cotton rolls [and] we decided to include two different sizes of foam discs.”
The PMA Action-Cleaning Tool uses round foam discs in two included sizes: 1″ diameter and 1.25″ diameter. Both size discs can be used alone, or with a 3″ patch wrapped around them. The handles of the tools are CNC-machined blue-anodized aluminum with a silicone sleeve for grip. The PMA tool handles are a bit longer than those of my old Sinclair action-cleaning tool. I like the added handle length, and I find the design of the handle easier to use compared to the old-style round knobs.
The PMA tools are quality items. They are an improvement over my older Sinclair action-cleaning set-up. But do the PMA tools they actually clean the action better or easier than the old style cotton rolls? Well, based on my experience, the answer is a definite “maybe”.
Comparison Testing — Cotton Rolls vs. PMA Foam Discs (with and without patches)
Starting with the old-style cotton roll system, I cleaned my actions to a level I considered “clean” in the past. I then tried the included PMA foam discs. I found that, for my Remington-style actions, the larger 1.25″-diameter disc seemed to work better than the smaller 1″-diameter disc. Wrapping the larger disc with a 3″ patch definitely brought out more crud from my previously cleaned actions than the old style cotton rolls. Well, you might ask, what if you wrap the old-style cotton roll with a patch? Yes that will remove more crud too, but perhaps not as much as the PMA system. Moreover you would have to buy both cotton rolls AND 3″ patches. Not many places sell the cotton rolls.
Is it worth plunking down the $49.95 for the complete PMA system? Well, if you want to upgrade to a quality-made tool with better handles the answer is yes. Is getting that last bit of crud out of your action every time you clean it that important to you? You have to decide that for yourself. From my own perspective, I was due for an upgrade so the answer was easy. I like the PMA system, especially the new improved handles. Also, with the PMA system I don’t have to fool around with a tiny Allen screw to secure the cotton rolls — that was annoying. So my final take on the PMA Action Cleaning Tool Kit is that it is a good product with some real advantages over other action-cleaning systems.
PMA Tool charges $49.95 for the complete Action Cleaning Tool Kit that includes a chamber cleaning handle and cotton swab. PMA offers the lug recess action cleaning tool by itself with four foam cleaning discs and five 3″ patches. Cleaning discs are also available separately in your choice of 1″- and 1.25″-diameter in a five pack.
A friend of ours recently took delivery of a new barrel which was chambered by a smith who had done the original build on the rifle, but who had not headspaced the barrel on the action itself this time. The smith headspaced based on his old records. Our friend happily screwed on his nice, new barrel and headed to the range. After the first few rounds, with known, safe loads, he was seeing deep craters on his primers, and then he even pierced a few primers with loads that should never have done that. Interestingly, the brass was not showing any of the other pressure signs. This was with bullets seated .015″ out of the rifling.
We were thinking maybe too much firing pin extrusion or maybe he got a hot lot of powder. Then I asked him to email me dimensions off his fired cases compared to new, Lapua brass. He emailed me that his shoulder moved 0.0105″ forward. I sent an email back saying, “hey, that must be a typo, you meant 0.0015″ right — so your shoulder moved one and a half thousandths correct?” The answer was “No, the shoulder moved over TEN thousandths forward”. Ahah. This explained some of the cratering problem in his brass. His cases were able to bounce forward enough in the chamber so that the primer material was smearing over the firing pin. And now he has brass that is “semi-improved”.
The point of the story is always check your headspace when you receive a “pre-fit” barrel, even from the smith who built the rifle. Purchase Go/No Go gauges for all your calibers. Headspace is not just an accuracy issue, it can be a safety issue. Pierced primers are bad news. The debris from the primer cup can blow into the firing pin hole or ejector recess causing a myriad of problems.
We know that many of our readers have never seen a “Hammerhead” benchrest stock before. This is a design with an extra wide section in the very front, tapering to a narrow width starting about 6″ back. When paired with a super-wide front sandbag, the hammerhead design provides added stability — just like having a wider track on a racing car. Some folks think mid-range and long-range benchrest stocks can only be 3″ wide. Not so — IBS and NBRSA rules now allow much wider fore-ends. While F-Class Open rules limit fore-end width to 3″ max, there is not such restriction on IBS or NBRSA Light Guns or Heavy Guns for 600- and 1000-yard competition. Here’s a 5″-wide Hammerhead design from Precision Rifle & Tool (PR&T).
Ray Bowman of PR&T sent us some photos of another hammerhead benchrest rig. Ray reports: “Here’s another benchrest rifle that Precision Rifle & Tool crafted. The customer shot this rifle at the 2014 IBS 1000-yard Nationals in West Virginia.” This IBS Light Gun sports PR&T’s “Low Boy Hammer Head” stock in red/black laminate. Other components are a 6mm BRUX 30″, 1:8″-twist barrel, Borden BR Action, and a PR&T 20 MOA scope rail.
Photo courtesy NRA MuseumClick Photo to View Larger Image
With today’s plastic-framed Glocks and Keltecs, aesthetics have been sacrificed on the altar of functionality. Not so in the early 20th century — in that period, the best firearm designers created guns that looked as good as they worked. One example is the classic Colt Woodsman. This design came from the legendary John Moses Browning and was later refined by Colt before the pistol’s introduction in 1915. The Colt Woodsman’s frame design evolved over time in three distinct series: Series One 1915–1947, Series Two 1947–1955, and Series Three 1955–1977. Shown above is a stunning Carbonia-blued and engraved Third Series model with ivory grips.
Engraved Colt Woodsman from NRA Museum In the NRA Museum’s Robert E. Petersen Gallery are many fine engraved arms. This Colt Woodsman .22 pistol is one of the Third Series guns that were made until 1977. Heavy barrels in either 4.5 or 6 inch lengths were offered in this variation. The Museum’s staff says: “We think the poised golden rattlesnake near the serial number is the [best] embellishment without putting down in any way the ivory grip panels or gold outline inlays.”
You can see this lovely Colt and countless other fine firearms at the NRA Museum in Fairfax, Virginia. The Museum is open every day from 9:30 am to 5:00 pm, and admission is free.
Bolt-In to Chassis Systems
The Founding of a Great Enterprise
We know that many of our readers have never seen a “Hammerhead” benchrest stock before. This is a design with an extra wide section in the very front, tapering to a narrow width starting about 6″ back. When paired with a super-wide front sandbag, the hammerhead design provides added stability — just like having a wider track on a racing car. Some folks think mid-range and long-range benchrest stocks can only be 3″ wide. Not so — IBS and NBRSA rules now allow much wider fore-ends. While F-Class Open rules limit fore-end width to 3″ max, there is not such restriction on IBS or NBRSA Light Guns or Heavy Guns for 600- and 1000-yard competition. Here’s a 5″-wide Hammerhead design from 
In the NRA Museum’s Robert E. Petersen Gallery are many fine engraved arms. This Colt Woodsman .22 pistol is one of the Third Series guns that were made until 1977. Heavy barrels in either 4.5 or 6 inch lengths were offered in this variation. The Museum’s staff says: “We think the poised golden rattlesnake near the serial number is the [best] embellishment without putting down in any way the ivory grip panels or gold outline inlays.”
