I have been a strong believer in these rings . Have used them on heavy recoil rifles , 300 magnums and 44 magnum handguns.
But this 45/70 is kicking their ass . Was having trouble with shifting POI , so I went back to basics and realized the scope had shifted forward and power ring was touching scope base .
So I stripped the whole set up down and cotton swabed all screw holes on receiver and rings with brake cleaner along with wiping scope tube and ring inserts down just to make sure I had the bases covered .
Reinstalled with blue loctite and tourqe driver . Also added +10 sleeves to bottom of rings for added meat .
Rezeroed rifle , made some loads and was looking good first range session checking occasionally the mark I had put on the tube .
Second range session , found a load I liked and then things started getting squerrily again .
Looked and dam tube mark was away from ring .
Don't know what else to do but go metal to metal with a different set of rings .
Hate putting ring marks on a scope , but I guess it's unavoidable sometimes .
Kenneth