I’ve got a M94 carbine and tried to shoot Barnes 225 gr XPB out of it and they tumbled. I contacted Barnes and they said that bullet was designed for revolvers, not rifles, but they didn’t suggest what might be a better choice. So I assume my barrel twist is too slow. Before anyone asks, I do not know what twist is. Does anyone know a copper bullet (CA) that might work better out of this lil rifle? Thanks.