What are you using to trim your cases? I also found that federal gold medal match cases were on the long side (0.005" over 2.015" vs 2.010" the lapua came as). I used the Lee trimmer and pilot that cut to 2.007". Also maximum length is 2.010", so I'd say between 2.005-2.010 will be safe. I also just bought a headspace gauge from Amazon.ca best 30 I spent yesterday, I recommend that you get one aswell.
I am going to use a lyman electric cutter, ordered one, hasn't arrived yet. For now, I am using the one that came with the Lee 50th kit and a lyman regular cutter


















































