Buffalo Bore does (put on your glasses and read this well) NOT MAKE PRIMERS!! It's quite possible that a PRIMER MANUFACTURER had made a bad lot and no one will know until they shoot them as it's obviously sporadic as the rest of your rounds worked fine.
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O.P.,
If you figure out a way to make sure primers are good before they are seated please let me know.
Has anyone here taken the time to go through the links that the OP posted and actually read some of the emails people are receiving from Buffalo Bore?
One of the biggest reasons I use buffalo bore is because I have had so many (too many) failures, incorrectly loaded, and terrible quality issues with Remington and Winchester ammo. I've Never had any QC issues with BB but I know it can happen. If they had a bad batch of primers and while ultimately its their ammo and their responsibility the blame might have to be on the manufacturer of the primers. Tim Sundles does not manufacturer primers. I have NEVER shot more consistent ammo than that of BB.
Like Erich suggested, call & talk to Sundles before making a drastic decision.
Or supposed emails that is, given the the very positive actions of BB to Boge I'm sure many others as well. There isn't any consistency here and there is much more to those one sided stories as is usually the case with even customers that I have seen first hand. Some people we have worked for even lied about us so they could run us under, yes there are some of those kind of people in the world. Not saying that the OP is the is way, just the links that are provided.