I use the QD because it was a gift. It's held up for three years of recoil and bouncing around the truck and ATV. Have never had it shift POI and I've taken the mount and scope completely off the rifle and the scope out of the mount and returned it. Works great!
B.
Warriors don't shoot bull's-eyes.
” Blessed are those, who in the face of death, focus on the front sight.” -Col.. Jeff Cooper
I had a QD burris on my 458 and it loosened up and cost me a hog. I wouldn't trust them on the big guns. My 450 has a fixed mount and my 458 now has one as well.