I have a Stag10, and use IVI brass.
They do require a lot of work to get back into shape.
1.full length size "small base dies"
2. Trim to proper length "they have very long necks"
3. Chamfer and debur neck
4. Swag and ream primer pocket to content depth
5.Run through my RCBS chamber guage. 'some just won't fit even after all that jazz.
I can usually get the cases to weigh within .5gn of each other. This is usually good stuff. I think the haters come from people not prepping the brass enough. .
My load is use is
Varget
42g
168 SMK
CCI BR2 primers
2.800 OAL
Can usually hold 1 MOA sometimes .75" , sometimes 1.25"