1ar4me,
Spooge and Troy are merely saying that the .223 Winchester round is 200 fps slower and thus not a military round. It may not be sealed either. (Mil spec would be identified as 5.56mm.) I have fired the white box .223 Winchester through my Bushy quite successfully, but if you read the ammo faq (long but a wealth of info) you'll realize that the .223 winny rounds would not fragment on impact except maybe at point blank range. (Fragmentation is desirable, since much more tissue damage in the victim will occur.) I will range fire my
winchester ammo, and keep looking for mil spec. ammo to store for those truly once in a lifetime occasions (-:
At under 200 yards there shouldn't be that much difference in point of impact, but there definitely will be some, and next time I am out there I want to see EXACTLY how many "clicks" different my Wolf is from my Winchester from my Lake City and Federal, the latter two I "save."