I once owned a 788 in .223 that I bought second hand from a guy ,who's wife purchased it from a slippery eel gun salesman as a moose rifle for her husband.I got the gun and a box [missing 3rds] of Rem 55gr FMJ.Now the story: not having much money and needing meat ,one round check the rifles zero,second round into a bull moose's hump @75yards and 3rd rnd into moose's forehead between the lookers.Gun for sale.Deer never require a second shot with a .222 or .223 with 55gr Hornady's and double lung hits.Usually a backwards cartwheel and slam the ground or the 25yard dash and a face plant into the dirt.If NATO thinks it's OK on 200lb humans why wouldn't it be on deer?Also know of 3 blackbears shot with my 55gr .222 loads no problem. Harold