.I tend to play devils advocate when it comes to explosives or powder fails. I'd check all my own procedures first as some of the fellas are suggesting, then if you cant find anything amiss, take them back to the shop. 8% fail rate, if it isn't user error, is a big deal and unacceptable. it means either the primers have been compromised during distribution or storage or its a production error. Worth making someone aware of it if you can't solve the issue.
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