I have some ammunition that I inherited and have no idea what they go to... First up, 351. On the back of the case it's stamped 351 on top and 87 on the bottom. What little research I've done online I've found these may be fired from a Winchester Model 1907...? The clip is stamped 31 and hold 10 rounds, here is a picture below... The second one is a .30 Carbine with a clip, the case is stamped 'R-P .30 Carbine'. I'd like to know if someone knows what gun fires these and what clip this gun might go to... Thanks for any help!