As far a primer set depth is there anything to be cautious about? I know that someone said that it could take a dbl strike to set off the primer. That to me sounds like a primer set to deep? What about a primer set to proud?
The primer is not "armed" until it's seated. So the first strike generally finishes the seating operation, the second sets it off. This "second strike" capability is why you bought a
hammer gun and not a
striker gun.
[ Be aware that any round may not fire instantly. You might also have a "hang fire", or highly delayed ignition. So always continue to point the gun in a safe direction. If you do have a
striker gun, the only recourse is to eject the round, kick it
way off to the side for several minutes, then reload it into the mag. In a
hammer gun one of the safety aspects is that any "dud" round remains in the chamber to get the "second strike". ]
If the primer is too high (say ~0.010" +), then there is always the chance of a "slam fire" where the breech face sets off the primer, not the firing pin. In these instances, the side of the case may blow out, with a shower of hot gas and brass bits blasting out of the ejection port. Or, if present in revolver ammo, the cylinder may simply refuse to rotate.
You cannot set the primer too deeply. The primer pocket dimensions define the seating depth.
Hope this helps.
PS. Good luck with your PT.