These are component bullets for firearms chambered for the .375 Winchester cartridge. This is not loaded ammunition. These are newly manufactured, hand-made, semi-jacketed, Bismuth core bullets with a 0.200" meplat (flat nose) that are perfect for tubular magazines of lever action rifles. These bullets are made by highly compressing #9 bismuth shot until the shot forms a homogeneous core devoid of any airspace. The light weight jacket fully supports this core all the way up to the 0.200" meplat. The soft jacket and compressed core allow the bullet to obturate in similar fashion to lead core bullets yet deliver non-toxic terminal performance to meet tough State hunting regulations found in States such as California. Do not expect the exact results you obtained with lead but these are still excellent bullets that will keep your .375 successfully hunting like it should.