Throughout my life I have generally just order 100 ct lots of rifle brass new , then full length sized , loaded and fireformed to chamber then trimmed to length . But over the last couple years I have been using more brass bought as once fired lc brass , and I like it . But my question is will just full-length sizing without fire forming then trimming work on 223 brass , I understand brass spring back that is why I usually fireform then full length resize again before trimming . Do you gentlemen fire your brass before trimming , or am I just being picky .