Weaver T-36.
There might be a newer version these days.
Poor man's F class.
Popular with smallbore as well.
22 cal holes easy to see at 100 yds and it doubles as a spotting scope.
Have not tried it out at 200 yds plus yet.
Weaver advised it can handle 375H&H recoil.
Leupold otherwise.
I was issued a 20X on my Winchester 52D with the USAF in the late '60s. IIRC it was a Redfield?
It was like cheating prone and the other three positions, I still owe the Air Force and the NRA points.
No.1V 223 Rem 1:12
No.1H 458 WinMag snubby.