Plenty of Germans, Italians, Japanese, North Koreans, and Viet Cong who aren't any less dead just because the M1 Carbine isn't a 1,000 yard battle rifle.
Pan have you fired anything in 7.62x39? I don't really know what the M1 Carbine recoil is like, but I would guess the 7.62x39 isn't very much more. Might be a possibility if you did want something with a bit more oomph.