I have another post titled Trapdoor carbine bullet about finding the right diameter bullet mold for it and I have a mold from Accurate ordered . This question is about when is it just to big for safety , over pressure or leading issues . Went down to buy some more black powder today and got talking with some guys . I talked about the types of ways to increase size I have tried but was getting some that dropped WAY over size and putting them back in to melt . One said the statement I have heard and read before about "if it seats in the case and chambers fire away" no worries . What are your alls thoughts on this . When does leading and over pressure star happening with a larger bullet ?