This is a 7 mm magnum barrel. It only shoots Nosler and Sierra Game king , and an occasional Hornady sst bullets. I spent over 4 hours cleaning last night and have used Hoppes#9. Castroil copper cleaner. Butch's Bore shine. Breakfree CLP. Caseys Gunscrubber to get all the cleaners out and lastly Ballistol..
I ran patches of all cleaners through the bore and let set for 15-20 minutes with exception of the castroil. Ran a new wet patch and let set another 15 minutes. Went to town 20-30 strokes of a Nylon brush. went back with a bronze brush. Threw bronze brush away as it appeared to make things worse. Patches came out black but no signs of copper as in blue or green as everything indicated. Put undersized brush on and ran patch over brush. I cleaned until I was wore out with it. Rifle has went from .333 groups to one inch to one and 3/4 inch groups. Older Remington ADL have had around 20 years. I had always used just Hoppes#9 and a thorough cleaning until we started reloading and putting a lot of rounds down range with it. Am I leaving cleaners in long enough or is there anther cleaner that is better than what I'm using or am I doing this wrong? I haven't shot since the severe cleaning last night but I still see what appears to be copper. I always put it away with a little ballistol or Remington oil when not going to the range for awhile. When I had the trigger job done on it the gunsmith ran a bore scope down and said it wasn't pitted but I needed to use Butch's bore shine to clean the copper out. That cleaner works on my 45 hand gun but isn't fazing this one. I'm open to any suggestions. Looked jor JB paste but not available in stores here. I definitely don't want to ruin the barrel. Probably has 500 rounds down the bore and 400 of those from last year at the bench. It has been my husbands hunting rifle since he bought it.
I ran patches of all cleaners through the bore and let set for 15-20 minutes with exception of the castroil. Ran a new wet patch and let set another 15 minutes. Went to town 20-30 strokes of a Nylon brush. went back with a bronze brush. Threw bronze brush away as it appeared to make things worse. Patches came out black but no signs of copper as in blue or green as everything indicated. Put undersized brush on and ran patch over brush. I cleaned until I was wore out with it. Rifle has went from .333 groups to one inch to one and 3/4 inch groups. Older Remington ADL have had around 20 years. I had always used just Hoppes#9 and a thorough cleaning until we started reloading and putting a lot of rounds down range with it. Am I leaving cleaners in long enough or is there anther cleaner that is better than what I'm using or am I doing this wrong? I haven't shot since the severe cleaning last night but I still see what appears to be copper. I always put it away with a little ballistol or Remington oil when not going to the range for awhile. When I had the trigger job done on it the gunsmith ran a bore scope down and said it wasn't pitted but I needed to use Butch's bore shine to clean the copper out. That cleaner works on my 45 hand gun but isn't fazing this one. I'm open to any suggestions. Looked jor JB paste but not available in stores here. I definitely don't want to ruin the barrel. Probably has 500 rounds down the bore and 400 of those from last year at the bench. It has been my husbands hunting rifle since he bought it.