Posted 1/15/2013 20:52 (#2825658 - in reply to #2825630) Subject: RE: Varmint Machinery .223???
NW KS
I think he is asking about the difference be 5.56 nato and .223 You can shoot .223 in a rifle that is marked for 5.56 but you can't shoot 5.56 in a rifle marked for .223 There are some slight differences in dimensions but the biggest difference the 5.56 has higher case pressure. Here is a link explaining the finer details.