Re: Taking a Poll on Bore Cleaning
I just got my Elite Iron build AR-10 Super Sass broken in. It's running a Broughton 5C 20" barrel. I spoke with Tim North at Broughton and he sent me the procedure he uses on his rifles.
A couple of patches with a high temp lube (Slip 200 or Montana Extreme bore conditioner, then a dry patch through the bore. Make sure chamber is dry as well with no build up of fluid creating a possible over pressure situation.
Shoot the gun.
2-4 wet patches with Copper Killer or similar product and let sit 5 min. Push another patch and inspect for fouling. If fouling is present, repeat above until fouling is completely removed.
Dry the bore with 5 or more patches....use alcohol to help remove any cleaners left in bore. Lubricate bore then follow with a dry patch...synthetic high temp oil is best.
Shoot the gun.
Repeat this procedure until fouling is minimal...6-20 repetitions of 1 shoot and clean, then 2 shots. Clean as directed above. If no increase in fouling is observed, start shooting 2-3 shot groups and clean as directed previously.
My AR-10 broke in FAST! Ran 5 shot groups after the initial process (10-12 of shoot then clean), hit it with the Copper Killer and no signs of copper fouling. I use a bore guide, nylon brushes (with aluminum bases) and aluminum jags so I don't get a false positive with the Copper Killer.
I was running Fed Gold Match 168's, which grouped well (about .75" @ 100), then switched to 175's. First 3 shots in the same hole! Dialed up the scope to about 425 yds and was hitting 8"-10" gongs. Someone had set up a bunch of clay birds on the bluff (which is our back stop), adjusted the scope and I was busting them with ease at about 440 yds.
Everyone has their own procedure for barrel brake in (or not). Take it with a grain of salt and choose what you feel is best for you. Barrel mfr is going to make a BIG difference on how fast and well the barrel will brake in. High quality barrels (Broughton, Bartlein, Rock, etc, etc will break in much much faster than OEM factory barrels.
Good luck!
Steve