There are a bunch of different 30/32 calibre rounds for handguns, and we'd have to know which one specifically you mean to give you a good answer. If it's REALLY "7.62", it could be .30 Mauser or 7.62x25mm Tokarev or possibly even 7.62 Nagant, and if it's "7.65" (7.65 Browning), then that's the European name for the 32 Auto cartridge.