Saw something this weekend that I have never ever seen before. Was shooting my regular #2 cast 358477 bullet loaded +P in .38 specials in my Marlin micro-groove rifle. After cleaning I spotted three very distinct black lumps towards the breech, about 3/4" ahead of the chamber. Tight cotton patches normally clean out all the leading, but this would could not even be removed with a brass brush.
I finally disassembled the rifle, and bent a paperclip to reach into the barrel. While looking down the barrel, after scrapping at the lumps for a while, they broke off one by one and fell out the muzzle of the barrel. It appeared to be lead, but I have never seen it lump like that before in my guns.
Anybody have any experience with this?
Michael