in regaurds to ' 30-06' for rabbits, it works, six years ago (give or take, its been awhile just the same) my father in law wer out deer hunting and he took a crack shot at a rab at about 50yds, hit it in head with 303 brit. it didnt run much after that. Iknow that this really isnt any help, but i thought id share with u all---