I use them on a regular basis and haven't had any problems with them yet under recoil.
Here they are on a .270 Win.
On my custom .338-06. If you're mounting on Winchester rifles I recommend the extended front base, it looks better and allows you to adjust eye relief more.
I also use them on another .30-06 Winchester FWT and a .300 Savage M700 Classic.
Talley rings, in general, are very high quality and work extremely well. As to those specific rings, I have installed them on various magnum rifles and they worked fine.