I was at a buds place for a weekend, had a new target rimfire and we were going to a silhouette match, I decided the barrel of my Anschutz 54 m1807 was too long for my taste, and on his kitchen table i, hacksawed 7” off the muzzle and filed it smooth and flat with a good sharp bastard-cut file. Emory cloth polished file marks off, then fixed crown with brass screw in hand drill and toothpaste (you can make do with what’s available if you where you are going and howto get there. I won a couple turkeys and got high score up there in Plumas county. ... this was in the late 80s I guess. I would do it again.