Re: copper fouling removal?
I have a rifle I use almost exclusively for test purposes. One of the tests I put it through has been JB bore paste to see for myself that it does or does not wear out barrels. On average, I clean it every 20 or so rounds. I then use JB to clean and a host of other solvents to clean out the paste before fouling it out.
I have put over 3000 rounds through the barrel. 3000 / 20 rounds is 150 cleanings. I wish I could say that it doesnt wear down the lands, however, it is still within specs and it still shoots anywhere from .375 - .5 MOA even at long range.
The next experiment will be to use JB with a few drops of oil to see if that helps cut down on the wear.
The bottom line: If you use JB every 20 rounds on a 308, you will clean out the barrel before you shoot out the barrel. If you are using it in a 300 RUM, you will shoot out the barrel before you clean the barrel out. So if you use it every 100 rounds or so and with a lttle oil (as recomended by the manufacturer) and clean it every 20-40 rounds in a more conventional manner, you have no need to worry. 150 cleanings is alot and she still shoots perfectly.
Long range shooting is a process that ends with a result. Once you start to focus on the result (how bad your last shot was, how big the group is going to be, what your buck will score, what your match score is, what place you are in...) then you loose the capacity to focus on the process.