Has your rifle be chambered with reamer? I now have 3 different rifles in 375 Snipe tac.
all have to be reloaded with different loads. Meaning that I can not use them in different rifles. Well the longer chamber will take the shorter ones. This is because the 375 Snipe tac is not a Sammi spec cartridge. So 3 different gunsmiths 3 different chambers.
I do get by with the dies I did get from Dave Viers. He does make dies set yet but not rifles as much.
One could get dies and go from there. Or fire 3 cases from the gun send them to Whidden and they could whip up some dies. They made my 375 Bum gauge.
Hope this helps. Good Luck.