Originally Posted by
pnut
When I have poorly seated or "too deep" of a seat with my .40 loads I soak them in water for about an hour, drain'm and let dry and deprime. I do wrap a towel around my press for each load just in case but have never had one go off yet (out of a couple dozen or so over the last year)
FYI In independent tests primers have been soaked in water for up to 4 weeks and still had a fire rate of over 90%.
Normally if you strong arm it when you seat primers it will deform them and you will see that right away. I have never been able to seat them "too deep" but I've never really tried. You can push them back out if you are careful but I would check to make sure of a couple of things before I reseated new ones.
1. are you using the correct primers ....large rifle as opposed to large pistol
2. are the pockets correct depth