New Barrel Break-In Procedures
Thank you for purchasing a Clymer's Ultra Desert Rifle. While all of our barrels are handlapped, a new barrel will shoot best if careful attention is given to proper break-in. The bore of your new barrel has "pores" in it and as you break-in the barrel these "pores" are smoothed over. A smooth barrel always cleans up better than one that is not.
Before we get started with the procedures the first thing I would like to stress is DO NOT USE MOLY COATED BULLETS while breaking in your new barrel. The reason for this is that moly will coat the inside of your barrel and as far as I know there isn't a cleaner out there designed to completely remove it.
1. A good one piece "coated" cleaning rod suitable for caliber of rifle.
2. Bronze bore brush suitable for caliber of rifle.
3. Cotton flannel cleaning patches.
4. Bore guide suitable for caliber of rifle.
5. Cleaning solvent such as Hoppes No. 9, Break-Free, Shooters Choice, Sweet 7.62 and our favorite Barnes CR10 are very good choices.
1. Clean Barrel after each shot for the first 10 rounds using a bore guide and rod with bronze brush soaked in one of the cleaning solvents mentioned above. Reapply solvent as needed.
2. Soak a patch in a good copper cleaner mentioned above and run through the barrel. If the patch comes out "blue" you still have copper fouling. Keep repeating the process until NO "Blue" appears on the cotton patch. Do not mix bore cleaners and solvents as you might get a chemical reaction, ruining the rifle barrel by etching it.
3. Repeat the above procedures for the next 30 shots, cleaning after every 5 shot group.
4. Once you have completed the above procedures and you are no longer seeing signs of copper you can go to a normal cleaning regiment. Our recommendation after your barrel is broken in is to clean your barrel after each use or after every 10 shots.
5.BUT!! If you are still experiencing copper fouling after going through the procedures, try Barnes CR10 if you are not already using it. Otherwise repeat all steps until the barrel is thoroughly clean and free of copper fouling.
Please note that these are not set-in-granite procedures. You may have years of experience in breaking in new barrels and have found a procedure that works just as well. These are just recommendations.
In Safe Shooting: Clymer's