I seat mine just below flush. Maybe they are hit and miss.I haven't had much luck with the SA small pistol primers from Argentina. The first go around, I seated them with my Dillon 550 flush like I have done other American made primers and have never had a problem. The first box of 50, I had 10 not ignite on the first try out of my Sig M17. They all eventually ignited, sometimes after the 2nd strike and some on the 3rd. I seated the next box of 50 using my Hornady hand primer. It seated them below flush and they were really flattened, much more than primers in factory loaded ammo. I still had failures to ignite with 4 rounds on the first try. I'm really disappointed in these SA small pistol primers. Anyone else had any luck using these? If so, did you do anything different, like enlarge the primer pockets on the brass?
Report it to Norma and see if they will refund you or have you send back the bad.