Barnes, deep primer seating if pretty common for reloaders. Most of the time the pockets are cut too deep. For reloaders, I made the mistake also, and cut them too deep by using a primer wisk in a drill to clean out the primer pockets. Don't do that anymore.

Sorry about your deer. Any manufacturing process is flawed, cause humans run it. You should have looked over your ammo however. I know I do. I have to agree remington makes some crappy ammo. Just take out your calibers and measure overall length. Or take your spend brass, and measure neck thickness or buy a batch of coreloks and wiegh them for consistency. But for 90% of hunters, this ammo is very adequate as shots will be very close.

I find Federal to be superior. Even the Winchester Sepreme.