I believe it, I have shot a lot of game with a .223, including my biggest whitetail buck, 250lbs and netted 151" Boone and Crockett. Shot in the neck at 80 yards with a 55grn, barnes X, the bullet did not exit, when cleaning and I was skinning the neck, the meat was nothing but purple jelly in a 10" radius. I do not hunt large game with this cartridge as a rule, but my wife brought her rifle, forgot her ammo, so I loaned her mine, and I took the .223 in hopes of getting a turkey, then this big boy showed up, decisions, decisions

The barnes bullets are high, but the results are near perfect.