if I use over 50 grns of 3f anything I smoke "ALL" of mine, I can shoot 100 grns of 2f and every thing works fine,, I ain't got any idea why,, but it does,,
I've noticed that same thing in a particular .45cal using just 50grns Goex 3F with .015" prelubed cotton patches...first time I ever encountered it, I couldn't find any patches on the ground...couldn't understand it.
Finally got the thought that maybe they were burning up/vaporizing...put a spare patch down on the powder first as a firewall, then a patched ball, and began finding the patches that held the ball, but they were still in bad shape.
Tried an .018" lubed pillow ticking patch by itself and could find them but they were in bad shape too.
But with a spare patch over powder + the pillow ticking patch, the ball patches no longer failed.
With a wonderwad over the powder plus a pillow ticking patch, it'll shoot 90grns of Goex 3F and patches are still so good they could be reused.
But...I can shoot entire range sessions with a .50cal and a .54cal, using 50-60grns of Goex 3F and only a .015" cotton patch and they're so clean they could be reused just by themselves.
The patch ball combo in the .45's seem just as tight as those in the .50 and .54...so I thought, well, it's a smaller diameter bore so there's higher pressure.
But then I thought no, the .440 ball is smaller & lighter too, so it's relationship / proportion to it's caliber shouldn't be all that much different from the other balls & weight are to their calibers, etc.
When I pick up the good .45cal patches, there's no cuts or burn throughs so their not being cut by muzzle or the lands that would allow blow-by...maybe a larger, tighter fitting .445 ball would help in the .45's