I took out my new mini-14 for the first time today. I first shot 20 rounds of remmington. no problem. then shot 5 rounds of AE Tactical 223. No problem. Then loaded five more rounds of AE tactical 223. First round was a misfire. The other four rounds were fine. Shot five more rounds with no issue. Then loaded five rounds of AE XM193 5.56 into the mag. First round was a misfire. The other four rounds shot fine. Any ideas why I experinced misfires? Is it a coincidence that the two misfires were the first round in the magazine? Just unlucky? I had asked Federal what was "tactical" about there Tactical ammo. They responded that they had a harder mil spec porimer. Maybe the mil spec primers are causing issues? Thanks.