7x65R is a very fine cartridge. Wonderful for a falling block. It compares to the .280 Remington so would be suitable for the same game that you might take with guns in the .270 to .30-'06 range. It is capable of excellent accuracy. The 7x57R is a nice little cartridge, but you are not confined to cartridge length so much with a single shot, so the longer 7x65R would, in my opinion, give you slightly more versatility. Good luck. Norman4