I built a 7mm 338 Papua imp. I fireformed brass over 2 yrs hunting with 104 gns of wc872 175 gameking in lands. They shot great. Killing several deer. Now I'm loading up my first loads with formed brass and getting lots of pressure very sticky bolt. Can't hardly open. People that I read about was going up to 110 gn I started at 104 what I formed with even went down and still have pressure. So I backed off lands .025 and down 1gn n still pressure. Having to trash alot of brass cause the case won't go in shell holder. Please help.