Primer failure is not uncommon...I've been shooting for about 40 years now near weekly and wouldn't want to even try to guess how many rounds I've put down a barrel, but an average weekend I may have 1-2k pieces of spent brass to deal with. I can't count the # of failed primers I have had but it's been a fair number...most the time on a second attempt the primer fires...had two such incidents last week alone. 1 was a factory loaded round and 1 was a reload (Fed 210M)...and one was in a handgun and 1 in a rifle. It does happen...not often but not uncommon.