April 23rd, 2017

Barrel Cleaning TECH TIPS — Criterion’s Advice for Bore Cleaning

Criterion Barrels Cleaning Clean Solvent rod guide Hoppes Wipe-Out

This article comes from the Criterion Barrels website. It provides good, conservative advice about barrel cleaning. Understand that cleaning methods may need to be adapted to fit the amount and type of fouling (and the particular barrel). In general, we do try to minimize brushing, and we follow the procedures Criterion recommends respecting the crown/muzzle. We have also had very good success using wet patches followed by Wipe-Out bore foam. Along with the practices outlined by Criterion below, you may want to try Wipe-Out foam. Just be sure to use a fitted cleaning rod bore guide, to keep foam out of the action recesses and trigger assembly.

The above video shows how to apply Wipe-Out or other bore-cleaning foam. We use a slightly different method. First, we use 3-4 wet patches to remove loose carbon fouling. Then we apply the foam as shown, but usually from the muzzle end (with bore guide in chamber). Here’s the important point — after 20-30 minutes, once the bubbles have dissipated, we apply the foam a second time, getting more of the active ingredients into the barrel. We then patch out, as shown, after 3-4 hours.

What is the Best Way to Clean a Rifle Barrel?

We are asked this question quite frequently alongside requests for recommended break-in procedures. Improper barrel cleaning methods can damage or destroy a barrel, leading to diminished accuracy or even cause a catastrophic failure. When it comes to barrel maintenance, there are a number of useful techniques that we have not listed. Some techniques may work better with different barrel types. This series of recommendations is designed to incorporate a number of methods that the Criterion Barrels staff has used successfully both in the shop and on their personal rifles. Please feel free to to list your own recommendations in the below comments section.

We recommend the use of the following components during rifle cleaning:

• Cloth patches (sized for the appropriate caliber)
• Brass jag sized properly for your bore
• One-piece coated cleaning rod
• General bore cleaner/solvent (Example: Hoppes #9)
• Copper solvent of your choosing (Example: Sweets/KG 12)
• Fitted cleaning rod bore guide
• Plastic AP brush or toothbrush
• Q-Tips
• Plastic dental picks
• CLP or rust preventative type cleaner

There are a number of schools of thought relating to the frequency in which a barrel should be cleaned. At minimum we recommend cleaning a barrel after each shooting session to remove condensation, copper, and carbon build-up. Condensation is the greatest immediate threat, as it can cause the barrel to rust while the rifle sits in storage. Copper and carbon build-up may negatively impact future barrel performance, increasing the possibility of a failure in feed or function. Fouling should be removed whenever possible.

The below tips will help limit the wear of different parts of your barrel during routine maintenance, helping extend the life of the barrel and improving its performance.

The Crown
The crown is the portion of the barrel where the bullet loses contact with the lands and grooves and proceeds to exit the firearm. The area most critical to accuracy potential is the angle where the bullet last touches the bore of the barrel.

Avoid damage to this area by using a plastic toothbrush and CLP type cleaner to scrub the crown from the exterior of the barrel. Even the most minimal variation in wear to the crown will negatively impact barrel performance, so be careful to avoid nicking or wearing away this part of the barrel.

Reducing Cleaning Rod Wear to the Crown
When running a patch through the barrel, place the muzzle about a ¼” from a hard surface that runs flat at a perpendicular angle to the cleaning rod’s direction of travel, like a wall or the edge of a work bench (pictured). When the jag impacts the hard surface, retract the cleaning rod and remove the patch.

By withdrawing the jag prior to its exit from the barrel, you are limiting the possibility of the brass dragging upon the crown if the rod is at all bent or misaligned. The soft cloth patch will continue to serve as the point of contact between the jag and the barrel, minimizing potential wear.

If possible, insert the rod through the chamber, pushing it forward toward the muzzle. Some rifles, such as the M1 Garand or M14, will require you to insert the cleaning rod through the muzzle. In these situations the use of a cleaning rod guide is recommended to limit the friction placed upon the crown.

Avoid using cleaning rod segments for scraping carbon from the recessed muzzle of an AR-15 barrel. We used this trick in the Marine Corps to impress the armorers and NCO’s with the cleanliness of our muzzles, but it likely played a significant role in reducing the service life of the rifle barrel in question.

Use a Q-Tip soaked in solvent to remove any copper or carbon residue from the recessed muzzle of an AR-15 barrel. A little bit of remaining carbon on the face of the muzzle will not negatively affect bullet travel so long as the crown edge remains consistent around the circumference of the bore.

The Lands and Grooves
This portion of the barrel may experience reduced efficiency due to copper fouling and cleaning rod damage. If copper fouling takes place during the initial break-in of the rifle, make sure to check our barrel break-in article.

For regular maintenance we suggest using a single piece coated cleaning rod rather than the traditional segmented rod or bore snake. While segmented rods and bore snakes may be convenient for field use, the corners between the segments may bow out and catch on the lands, scraping along the length of the rifling. Residual grit and particles from expended cartridges may also get caught between segments, resulting in an abrasive surface working its way down the length of the barrel. Most bore snakes will remove significant amounts of carbon fouling, but may fall short in the removal residual carbon buildup and copper fouling during deep cleaning. Good rods can be sourced from multiple manufacturers, but we have found good results using both Pro-Shot and Dewey brand products.

General cleaning requires the use of patches rather than nylon or brass bore brushes. Brass brushes may be required when aggressive cleaning is required, but can lead to unnecessary wear on the barrel if used frequently. This is not due to the nature of the soft brushes themselves, but from the abrasive particles of grit that become embedded in the material that is being run repeatedly through the bore. We recommend the use of bore guides when cleaning from both the muzzle and breech. These bore guides will help serve to protect the crown and throat from cleaning rod damage.

If significant resistance develops while running the cleaning rod through the bore, no attempt should be made to force it in further. Back the rod out and inspect the barrel to determine the cause of the resistance. The jag may be pushing between a bore obstruction and the rifling, digging a divot into the barrel before pushing the obstruction back through the muzzle. One way to minimize the risk of a stuck rod is by utilizing a slightly smaller patch during the initial push.

The process of cleaning the length of the rifling is relatively straightforward:

1. Check to make sure the rifle is safely unloaded.
2. Carry out any necessary disassembly procedures prior to cleaning.
3. Remove bolt (if possible) and insert fitted cleaning rod bore guide in action.
4. Soak a patch in bore solvent (similar to Hoppes #9).
5. Center and affix the patch on the brass jag, inserting it into the chamber end of the barrel. A misaligned patch may cause the jag to damage the lands of the rifling, so make sure the patch is centered on the jag.
6. Run the patch the full length of the barrel, retracting it upon reaching the end of the muzzle.
7. Let the solvent sit for a minute.
8. Continue to run patches through the bore until carbon residue is minimized.
9. Run a dry patch through the bore to ensure carbon residue has been removed.
10. Soak a patch in copper solvent (Sweet’s or KG-12).
11. Run the patch through the bore, leaving it to sit for 3-5 minutes (do not let solvent sit for more than 15 minutes.*)
12. Repeat this process until no blue residue remains on the patches.
13. Run a patch of Hoppes #9 and a dry patch through the bore to neutralize the copper solvent.
14. Inspect the barrel prior to reassembling the rifle, verifying that no bore obstructions remain.

*Please note that some ammonia-based copper solvents may prove to be corrosive if left sitting in the barrel for an extended period of time. It is essential that these solvents be removed within 15 minutes to avoid ruining the bore.

The Chamber
Proper cleaning of the chamber is a critical component of a general cleaning procedure. Carbon rings can build up near the neck and throat of the chamber wall, leading to feeding malfunctions and pressure spikes inside the chamber.

The chamber can be the trickiest part of the barrel to effectively clean, due to its fluctuation in size and the awkward ergonomics often required to remove carbon residue. Numerous chamber specific devices have been created to address this problem, and while some should be avoided (steel chamber brushes), others can be used to great effect (cleaning stars and plastic dental picks). The simplest approach to cleaning a chamber is to apply solvent to a couple patches, and use the cleaning rod to spin the wadded up patches inside the confines of the chamber. This should aid in removing any excess carbon. A Q-Tip can be used to reach portions of the chamber unreached by patches.

The Barrel Exterior
While the condition of the crown, rifling, and chamber are essential to firearm performance, the finish of the exterior should also be cleaned after handling. Condensation, humidity, direct water contact, and salt residue from skin contact can cause rust or corrosion. An application of anti-corrosion products is recommended when placing a firearm into deep storage for an extended period of time. [Editor: AccurateShooter.com recommends Corrosion-X or Eezox, but other products work well too.]

Finding Cleaning Components
While most cleaning components can be found at your local gun shop, some specialty items may need to be sourced through online retailers such as Brownell’s. Criterion utilizes both Dewey and Pro-Shot brand cleaning components during our day-to-day operations.

Do you have any rifle cleaning tips or tricks not mentioned in the above article? We’d love to hear about them. You can post your comments below.

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September 6th, 2013

ATK Acquires Bushnell Group Holdings for $985 Million

ATK Alliant Techsystems buys Bushnell Bolle Hoppes Weaver RCBS CCIIt’s official — ATK is acquiring Bushnell — for a whopping $985 million. ATK (Alliant Techsystems) has executed a definitive agreement to acquire Bushnell Group Holdings, Inc., a leading maker of branded sports optics, outdoor accessories, and eyewear. In addition to rifle scopes, Bushnell makes rangefinders, binoculars, spotting scopes, GPS units, sunglasses, and more. Bushnell sells a myriad of other products for outdoorsmen through its brands Simmons, Tasco, Millet, Butler Creek, Bollé, Serengeti, Hoppe’s, Night Optics, Primos, Stoney Point, Hoppe’s, and Uncle Mike’s.

Under the terms of the transaction, ATK will pay $985 million in cash, subject to customary post-closing adjustments. Bushnell’s projected sales for calendar 2013 are approximately $600 million. ATK will finance the acquisition through a combination of $900 million of secured financing, borrowings under its existing revolving credit facility, and cash on hand. The transaction is subject to regulatory approvals and customary closing conditions. ATK anticipates closing the transaction in the third or fourth quarter of its Fiscal Year 2014.

Mark DeYoung, ATK President and CEO states: “This [Bushnell] acquisition will broaden our existing capabilities in the commercial shooting sports and expand our portfolio of branded shooting sports products. In addition, this transaction will allow the company to effectively enter new sporting markets in golf, snow skiing and camping.”

Bushnell markets 19 outdoor brands in sports optics, outdoor accessories and performance eyewear, including the Bushnell brand and other notable brands such as Primos, Bollé, Hoppe’s, Uncle Mike’s, Butler Creek, and Serengeti. Founded in 1948, Bushnell is headquartered in Overland Park, Kansas and employs approximately 1,100 workers worldwide.

Bushnell Will Become Part of ATK’s Sporting Group of Companies
ATK will integrate Bushnell into its Sporting Group within its existing accessories business. ATK Sporting Group’s ammunition brands include Federal Premium, CCI, Fusion, Speer, Estate Cartridge and Blazer. ATK’s accessories brands include Alliant Powder, RCBS, Weaver Optics, BLACKHAWK!, Champion, Outers, and Gunslick Pro. In June 2013, ATK acquired Savage Sports Corporation, adding centerfire and rimfire rifles, shotguns and shooting range systems used for hunting, competitive and recreational shooting to its product offering.

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March 2nd, 2013

Bushnell Outdoor Products May Be Sold in Billion-Dollar Deal

Got a billion dollars burning a hole in your pocket? Bushnell Outdoor Products (Bushnell) is up for sale according to Reuters. Bushnell, which has annual revenues of $450 million, is going to be sold off by its current owners, MidOcean Partners (private equity firm). Reuters reports that Kansas-based Bushnell could be sold lock, stock and barrel in a billion-dollar deal. The potential buyer(s) have not been revealed.

Bushnell Midocean partners sale billion

Bushnell was founded in 1948. The company makes scopes, binoculars, GPS units, laser rangefinders, GameCams, eyewear, and other outdoor gear. Bushnell is the parent of many other outdoor product brands, including: Bollé, Butler Creek, Final Approach, Hoppe’s, Millett, Night Optics, Primos, Serengeti, Simmons, Stoney Point, Tasco, and Uncle Mike’s. Last year the Bushnell group of companies had $100 million in earnings before taxes, interest, and depreciation.

Bushnell Midocean partners sale billion
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February 16th, 2011

Hoppe’s Sends Cleaning Kits to U.S. Marines in Combat Zones

Bore Snake Kit USMCHoppe’s has partnered with America 4R Marines to supply more than 5,000 BoreSnake gun cleaning kits to U.S. Marines currently serving in Afghanistan and Iraq. America 4R Marines is a nonprofit organization of volunteers that supplies much-needed items for battalions or units in the most remote and hostile areas of operation. The mission of America 4R Marines is to not only support the troops with basic human needs and comfort items, but also to provide tactical products that can help military personnel better maintain their equipment and remain safe in combat zones.

The Hoppe’s BoreSnake Soft-Sided Gun Cleaning Kit allows soldiers to quickly clean the bore of their weapon and get it back in to service. The patented product is also small and lightweight for easy transportation in the field. “We’re honored to partner with America 4R Marines and provide much needed supplies to the troops serving our country,” said Phil Gyori, vice president of marketing for Bushnell Outdoor Products, the parent company of Hoppe’s.

Bore Snake Kit USMC

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