Went to the range today to shoot my AI-AT .260 Rem. My AT has the large firing pin bolt. I shot 110 of my reloads and 5 Hornady Fusion factory 120gr loads. All of the factory loads fired without a hitch. However, 7 of my 110 reloads did not fire. My reloads were with once fired Lapua brass and Federal 210M primers. Two weeks ago I fired 75 rounds of my 6.5 CM reloads with the same primers and rifle and had no problems. I've never had a FTF primer from Federal and to have 7 out of 110 seems scary. Any ideas of what might be going on? Also, the FTF's did not occur all consecutively, but scattered among the two boxes of 50. The lot # of my 210M's case is 2RE119. I just added a picture of two of my cases. The one on the left fired and the one on the right was a FTF.
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