Forums › Forums › Technical Articles › .223 T3 Technical Articles .223 T3 Posted by dawgdad91 on May 16, 2014 at 12:39 am can the .223 T3 safely fire a nato 5.56. I suspect the answer is no, but I don't know for sure. I have a slightly used T3 Varmint with a 1 in 8 twist.. Larkin replied 8 years, 8 months ago 2 Members · 3 Replies 3 Replies .223 T3 Larkin updated 8 years, 8 months ago 2Members · 3 Replies Technical Articles Larkin Moderator May 16, 2014 at 12:46 am 295 Bullseyes Hi you suspect correctly the answer is NO dawgdad91 Member May 16, 2014 at 3:00 am 1 Bullseye Thank you. I just wanted to be sure before I blow the thing up. 🙂 Larkin Moderator May 16, 2014 at 4:44 am 295 Bullseyes To shoot .223 and 5.56 you need a Wylde chamber , I think it's slightly longer to take into account the 5.56 Log in to reply. Public All Members My Connections Only Me PublicAll MembersMy ConnectionsOnly Me Public All Members My Connections Only Me Original Post 0 of 0 posts June 2018 Now