These things stink! I think this guy sized them way wrong. I got a couple that i almost had to run to the shop to get a hammer to push them down. They arnt grouping at all with 90 grains. Im going to clean the rifle again, switch back to the CCI primers and 80 grains RS. So far thats the only load that shot well. Remington kleanbores again shot like junk and the federals did ok. Winchester w209's did horrible. One more cleaning job and 3 more shots and im calling it a day. They measure .503 1/2 on the caplipers and i think this is whats causing the problems. I prefer a .501 from BS and those shot great.
Just try a lower charge and see what happens.