The vortex on the pws started out on my 700 LTR in 308. I moved it to the pws later in life then put a leupold vx3i lrp 4.5-14x on the pws and moved the vortex back to the 700. This scope went back when it was new because it wouldn't group on a known shooter, wouldn't track and the eyebox was very critical. Vortex said the ocular ring was loose. Has tracked fine and held zero ever since, just has black spots in it now.
The one on the win mag has the biggest black spots in it. That gun weighs 13lbs and has a good brake on it. I think we measured recoil on it right at 10 ft-lbs. With a 200gr bullet. So I don't think recoil was it's issue.
Talked to a friend of mine last night. He has one on a 700P in 308, purchased about a year after mine. Said his is doing the same thing.
The brake won’t have anything to do with the resonant wave that propagates through the scope from the initial shock impulse that starts in the chamber and moves outward from there.
I broke an S&B PMII 5-25 doing a lot of accuracy proofing on factory rifles, mostly .308, .300 Win Mag, and .338 LM rifles from range-opening to closing, day-after-day. Side Focus went kaput and image was cloudy, nothing you could do about it but send it to S&B.
The gold standards in durability are NF and Razors for variable power, quality turret, feature-rich rifle optics.
I would look there for the PWS 216.
Other companies will have to prove themselves over many years until we can take them seriously in that department.