45 2 7/8 Groove Dia Patched

[powderburner]

Bob , it worked well with a 446 Ballard bullet and not too bad with a 444 but I didnt like it as it wasnt as thick as the rifling.when it was on a bullet. I also used it on my 50 3&1/4 with the big ballard bullet for it as well,
I got mine quite a while ago and it is 100% cotton, so I guess I should have said that as well ,the new stuff doesnt say on the rolls. and I cannot vouch for its performance like the old stuff.