338 Cal Match Grade Barrel
- Brand: Mountain Tactical Company
- Product Code: 338BARREL
- Availability: Custom Order (8-12 weeks)
Mountain Tactical Company was founded with the passion to provide precision components for the everyday shooter. One of the most critical components on a precision rifle system is the barrel.
For the last couple years, we’ve been working on producing affordable, accurate barrels suitable for the most demanding precision shooter and the casual hunter alike. Whether you are upgrading an old hunting rifle or building a ground up custom, a Mountain Tactical Company precision barrel will exceed your expectations.
Our barrels start out as certified 4140 or 416R Rifle Barrel Steel. 4140 requires a finish such as Cerakote or bluing to avoid rusting. 416R lasts longer than 4140 which is why it costs more.
Barrel blanks are stress relieved then gun drilled, reamed, and button rifled on modern CNC equipment. Barrels are then stress relieved to remove any internal stresses from the button rifling process.
To ensure utmost accuracy, each barrel is then hand lapped to remove any tooling marks to ensure the bore’s surface finish. By double stress relieving each barrel, internal dimensions will not change during the contouring or chambering process.
***Professional gunsmith installation required***
All barrels are precision button rifled, stress relieved, and hand lapped to ensure consistency and ease of cleaning. Prior to shipping, every barrel is air gauged to confirm measurement and consistency.
There are a lot of debates out there about how many lands/grooves make the most accurate barrel. We can say that without a doubt that we have yet to manufacture a barrel that isn’t inherently accurate.
Fluting refers to the removal of material from a cylindrical surface, usually creating grooves.
The main purpose of fluting is to remove weight, and to a lesser extent increase rigidity for a given total weight or increase surface area to make the barrels less susceptible to overheating for a given total weight. However, for a given diameter, a non-fluted barrel will be stiffer and able to absorb a larger amount of heat at the price of additional total weight. There is a lot of information, or misinformation on the web concerning fluting. One piece of misinformation is that a fluted barrel is stiffer than a non-fluted barrel. This is in error. A fluted barrel of, let’s say, a CTR Contour will be stiffer than a barrel of the same weight, such as a Lite Contour. But a CTR Contour that is not fluted will be stiffer than a CTR Contour that has been fluted. It is a mass effect, the more mass around the bore of the barrel, the stiffer it will be.
Break in Procedure
To obtain the best accuracy from your new Mountain Tactical Precision Barrel we recommend that it is properly broken in. The procedures outlined below are our recommendations and not “set-in-stone” procedures, we have found that there are a wide variety of break in procedures available out there and one may fit you better than others. To get the most out of your barrel and ensure that it won’t foul in the future please use these or your ideal break in procedures.
There are two types of fouling that will affect your accuracy, copper fouling which is caused by the jacket from your bullets being stripped off in the barrel and powder fouling. Typically, the first few rounds shot through your rifle will cause copper fouling. It is very important to prevent the fouling from building up in your barrel to remove this fouling after each shot. Powder fouling is normal with any rifle or pistol and is easy to remove.
DO NOT USE MOLY COATED BULLETS DURING BREAK IN
- We have found with experience that for you to get the best results out of your barrel you should clean after each shot for the first 10 rounds or until the copper fouling stops. With all our barrels being honed and hand-lapped we have found that fouling is minimal.
- Always use a bore guide and a good, coated rod when cleaning.
- Use good quality phosphor bronze brushes.
- Use good quality cotton flannel patches.
- Use a quality bore cleaner like Butches Bore Shine or Sweets to remove any copper. Copper residue will show up as blue with these cleaners.
- Soak your cotton patch in your bore cleaner and swab through the barrel. Once the barrel has been completely coated let sit for 30 seconds and use your phosphor bronze brush dipped in the same solution and scrub your bore (about 10 to 20 strokes)
- Afterwards, run a clean patch through your bore until it shows no signs of copper. You may have to repeat steps 5 through 7 until it is clean.
- Use a good bore cleaner (not a copper remover) to clean the bore completely of the copper remover afterwards.
you have cleaned after each shot you will be able to tell when your bore
is no longer
copper fouling. Once you have seen this you can move on to cleaning after every 3 to 5 shot group. This should be done for the next 40 rounds.
- After which it is probably wise for you to check your barrel after each day of shooting or at least every 25 rounds.
- Certified 416R Rifle Barrel Steel
- Certified 4140 Rifle Barrel Steel
- Lite .624” Muzzle
- CTR/Continental .783” Muzzle
- Varmint/Tactical .890” Muzzle
- .0003” max