I bought a few hundred plane Jane 60gr hornady SP at midwayusa a few weeks ago specifically for shooting deer out of my AR. Never used them from an AR but they turn a deer’s lights out in a hurry out of a 22-250. Hornady 55 are deadly too. 60’s seem to penetrate a bit better as would be expected. I’ve killed quite a few deer with Sierra 1365’s out of a 223 also. They worked great but it was a 12” twist gun. Not sure if the faster twist of an AR would change much but of those three I’d go with the 60gr hornady and go forth and kill deer!
