I got thus drilling that is marked 7.7x57. I chambered cast it. It is a 8x57r360. Some one in swiss forum had a diagram of the cart. All conversion books don,t list it. Cot brass and bullits from huntington but only got one load from handloader mag. Does any one have other info on this cart??

It is listed in Cartridges of the World. "Copy of the British 360 Nitro Express No. 2." It seems the case is based on the 9.3 X 72R necked down and trimmed to 57mm. These cases are available. It is supposed to be in the same ballistics class as the .32/40 Marlin/Ballard/Winchester, but uses .318" bullets. I think light .32/40 data could be used for starting loads. It will fire bullets in the 200-grain weight range up to 1700-1800 FPS, so could be used for short-range deer shooting.

COTW Loads:
196 gr bullet, 37.5 gr RL 19 MV 1893 FPS
196 gr bullet, 37 gr IMR 4350 MV 1820 FPS
196 gr bullet, 26 gr IMR 3031 MV 1560 FPS

A 196-grain .318" bullet at 1800 FPS is nothing to be sneezed at!!
Good luck!!

[ 07-22-2003, 22:13: Message edited by: eldeguello ]