That is the absolute total opposite of what I have experienced with Uberti revolvers. I have a couple that tend to get some leading around the forcing cone area with smokeless but not with BP.
If anything they are more accurate with black powder loads with no leading and cleaning just takes a couple swabs of moosemilk down the pipe followed by some clean patches.
My Uberti's LOVE black powder.
If you are getting leading with smokeless, that means that you are taking the bullet to high speed, so it leads or maybe your bullet is soft, and that can happen with smokless of BP..
Bp, in reality, is just part of the problem, the main problem is the bullet that you must use in BP, hard cast with no shoulder, picket bullet of the period type.
the leading is not only in the forcing cone, but in all the barrel.
but as a matter of fact, I have avoided that problem, just by casting a much harder bullet, and choosing one with very deep grooves.
what I have not changed is the innacuracy, really mediocre, and inconsistent with such loads. Sometimes good, and sometimes a disaster. Maybe later Ubertis have improved, but for years they proofed me they are not trustworthy in the accuracy aspect.
if you can share targets, shot one hand, at 25 meters, and share BP load, and bullet type, number of shots before getting leaded the barrel, I would appreciate it.
targets at 7 yards, or 12, are not valid. Even a philippine revolver is accurate at such distances.
one day, one hand standing, 25 meters, 28 grains of 2F, around 220 grains bullet (my memory is failing now).
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same load, just any other day
allways some fliers, of course
another day
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I have tried 250 grains, but the gun seems more accurate with lighter bullets at powerful BP loads.