RE: Post season deer hunting....
.243 or .270, it doesn't matter if they are real close. its the further shots you are going to have to be worried about. i have shot deer with my 30/06 at 20 yards and less and its does the job just as good as at 200 yards. i won't recommend anything smaller than .22-250 or .223. my .22-250 would laser a deer at 200 yards but i don't think it is enough gun so i hunt with my 30/06 or my bow. good luck