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In recent months, increased my use of 9mm range pick up brass. Case on the left loaded in Glock 19 - click when trigger pulled, no fire and no primer indent. After pulling bullet discovered case is long. First malfunction in Glock of this nature in a very long time. From what I have read, a Glock is very capable of an out of battery fire. Don't recall ever encountering a 9mm case that long.
Due to nature of brass, increased quality assurance checks at several points, to include plunk test in barrel for every round. In so doing caught the round on the right, bad brass.
As stated, the problem for OP is more than just primers. Need to check brass length, use case gage or barrel plunk test, check on bullet seating process, and OAL of loaded rounds.