I can only comment on what ive seen, and in every case so far ive found nothing wrong with the primers only the operators ammunition or rifle..
Ive never had a crook primer, and ive been shooting for a while, and im still of the belief that yes it's quite possible to have a crook primer, but 3 or 4 during a days shoot is far to many, and odds are the primers are NOT to blame..
Sorry, but in this case it is the primers at fault and a whole batch at that. Some of these guys having issues were on the Australian team. I have only ever had maybe two shots that failed to go off ever so primers are very reliable indeed, but just because it has not happened to me it does not mean it cant happen. I actually bought some CCI BR primers to try before the Worlds, but after seeing the issues friends were having I decided they were not worth the risk. Just because you have never seen primer issues it does not mean that in this case it is not primers. There was no other issues it was primers full stop. How many Queens have you been to when 20 people all using the same brand and type of primers are having shots that dont go off? We are not talking about an odd shooter here we are talking about very very experienced shooters at a Queens and many of them.