The problem with the Federal Tactical is that all the performance data is from a 14.5" bbl. Personally I'd be tempted to go with either LE223T3 for penetration or with T223F for fragmentation.
What is the going oppinion on alternating rounds in a mag - ie. 223F, 223F, T3, 223F, T3, etc.
Good? Bad? Doesn't matter?