Well I’ve been reloading since the 80s the only case I’ve ever gotten stuck is 223. Always from acquired brass and I suspect rounds they were fired out of a machine gun. With that being said there’s a way to get a stuck case out without destroying to die but I have no idea about one that’s got a bullet in it. As a matter of fact I have no idea why you were trying resize a loaded round but that’s besides the point. Things happen. If you decide to scrap the die before you start messing with it send me a PM I’ll send you the shipping and play with it I like a challenge. I don’t really think I’ll be successful but like I said I like a challenge.