I have 2 264 mag. both are built on the 03 mauser recievers. both have douglas barrels, both barrels are 24 inches, I shoot a 129 grain hornady bullet in both of them. both guns are fitted with custom stocks one blonde laminated, and a grey laminated. both crony over 3100 fps. on white tail deer it will put them down, altho I dont use them for hunting any more, I still take them to the rifle range every year, I would hate to guess how many shots have fired threw thease guns. they are still tack drivers. I think this cal. was devolped from from the 458