- Thread Starter
- #61
They may be stripping based on the leading I'm seeing. I use kroil and chore boy copper mesh on a bore brush to get lead out. Best method I've found.the marlin micro groove rifling was not intended to shoot lead bullets...why you say.....because the micro groove rifling is very shallow so that when one shoots lead through it the lead has to be cast real hard and sized at least 1 thousand over the bore diameter other wise the barrel will lead like crazy because of stripping down the bore. the micro groove barrel has 12 lands and grooves and are very shallow. before you fire lap that barrel and make the lands and grooves even more shallow than they are, you should cast some bullets using linotype or other metals to give you a harder bullet and being that you said the bore is .431 your bullets should be sized to either .432 or .433. if they are too small or too soft then they will lead like crazy. the best stuff i found to removing lead is Kroil. you can either use it straight from the can or do a 50-50 mix with your bore cleaner HTH
Rick