Re: Bertram brass sticking in shell holder?
I have tested Bertram .338 Edge, .338 Lapua, .375 Cheytac and .408 Cheytac brass. All had slightly thicker rims than other makers of brass.
I don't think this is an accident.
When making super strong brass, extra thickness in the base and rims helps support the primer pockets and web.
Just pick a shell holder with greater tolerance and you will be ok.
scientia est potentia