Brendon, I had a 4X Leupold on my FA .475L for several hundred rounds without problems using all bullet weights. No problems. Switched to an UltraDot for several hundred rounds without problems.
JD Jones told me years ago he thought the old Simmons 2-7X was the toughest scope he could find to test on his JDJ rounds. I have 3, one on a .416 Taylor Encore for 500+ rounds, one on a Taurus Raging Bull .500 S&W for 500+ rounds, and one on a .41 Mag. Raging Bull for 300+ rounds. I've never had a problem with them.
I don't know if the newer 2-6X Simmons are as tough. Maybe someone could chime in on experiences with it.
A lot of people (as well as JD) gripe about the Burris variables. I'm using 10 3-12 Blexes and 2 2-7 non Bplexes on guns
and had exactly one problem (non function reticle) in the last 18 years. JD just shakes his head.