I bought a 100 pieces of Norma 22-250 brass for a match. At the time, Lapua did not make 22-250 brass. I had to ream every one of those pockets as they were not deep enough.
As to primer sizes. I have 3 lots of Remington 9½ primers. They all measure smaller in diameter than any other primer I've used. Very noticeable when seating. I just figured they were all that way
