I picked up a m44 with a sewer pipe looking bore. I used my outers flexible line cleaning kit with lots of hot water and patches to clean up but still looked ugly. I ran the .30 cal bristle brush through but thought there was little resistance. I ran the .35 cal brush through, now every time I follow through with a patch it comes out "rusty shorts looking" and the bore looks far cleaner than before. Anybody know if that .35 cal copper bristle brush did more harm than good. Thanks
Last edited: