Re: primer seating quetsion
a friend came to me with a similar problem with hornady brass, the primer pockets were not factory cut deep enough,when ypu tried to prime them on the press they would not seat deeply enough catching on the shell holder. when you entered the sinclair primer pocket uniformer you could easily place you thumb nail between the case base and the shoulder of the uniforming tool and if you removed the brass needed to fit the primer to the correct depth there was next to nothing left, i certaintly would not use them , hornady brass in my exp usually takes just a turn or two to ream the primer pocket, so i guess would be to carefully check the primer pockets with a quallity uniformer. i assume every thing on the press checks out, the primer cup is coming up dead center of shell holder and at the correct height.