Specs on the rifles???
Cleaning regimen on the bolts?
How old is the ammo?
How was the ammo stored?
Did you search the interwebs for misfires or light primer strikes for those rifles and ammo?
Don't know if this will reveal a definitive answer, but maybe we can eliminate some possibilities.
Valid questions. One is an 7-08 I had built about 3 years ago by Accurate Ordnance on a 700 action. The other is a 700 KS SS in 280. The bolts are cleaned, but not disassembled. They’ve been shot less than 100 rounds. The ammo is 5-7 years old maybe and stored in a safe with 2 dehumidifiers.
