I mess with smokeless muzzleloaders and have for years, they shoot large heavy bullets fast.
275-350 grainers from 2750-3250 FPS.
they also generate a LOT of recoil, even with a good brake
they are also hard on scopes, a scope that can take the recoil is generally very heavy and it takes really good rings to hold a heavy scope on a hard recoiling gun.
some of the rings I have used;
Seekins
NightForce
Leupold
Warne
TPS
Near
Ken Farrell
Burris
The new Zeiss made by Teir One in the UK
many others as well
A lot of these rings work very well on CF guns, even the Magnums, up the speed and bullet weight and many of these same rings slip trying to hold a heavy scope, most 2 screw designs just don't cut it in my world, been there & done that.
I have settled on the 6 screw NF Ultralights, well made, fairly light, extremely strong.
Never had a scope slip after using probably 30 or so sets on different guns.