Loaded up 200 9mm rounds for the range in my Dillon 650 and had a pretty major issue at the range. Id say possibly 30% of my rounds failed to fire. the primers had clear strike marks on them and im positive the seating depth of the primers is solid. Sometimes the round would sound like it had squibbed and then would go off. id get that distinct "pop" of a squib and then a tenth of a second later the charge would fire. would bad primers do that? or should i toss my powder too? The primers were the 4th or 5th set of 100 out of a 1000ct box. everything is stored in my reloading room in the basement of my house and kept dry but the humidity is on the higher side generally controlled to 50-60% would primers be sensitive to that? it just seems odd to be getting a bad bunch of primers in the middle of a box. If anyone has some idea of whats going on im taking all ideas at this point haha.