I had mine to the range couple weekends ago. For some inexplicable reason, I'd removed the old Weaver K 2.5 from the 500 barrel, and put it on a US Model 1903A4 for a "vintage sniper rifle match" that I didn't make it to. In it's place, I'd put what I thought to be a proven scope, a Sears branded Weaver 3X, if I recall correctly) and ran out of adjustments on it.
Went back into Cheyenne, and found an absolutely ancient 7/8" tube Leupold 2.5 fixed duplex reticle and it came with the ring adapters to mate it to 1" rings. Liberally applied loctite to every screw I could get to, and even put a dab between tthe scope and the Weaver ring base.
It has now stood up to 50 rounds of 500 gr. Hornady's and some 400 gr. hard cast bullets, both with near capacity loads of 2400. Everything so far is copacetic.
BTW, this barrel came from the accessory program, mounted it to the frame of my .45-70 BC, and still has the straight grip stock with steel buttplate. I managed to get about thirty rounds downrange before my eyes crossed, and handed it off to a Bud to try. He managed two shots and hung 'er up......I'm healing nicely, thanks, and it didn't really do to much to me, too much to me, too much to me...........