The one piece Leapers/UTG mount, with screws properly torqued with loctite and the stop pin properly adjusted for the hole with loctite, will hold up to the recoil of anything you can throw at it. Just remove the screws and clean the and the screw holes with denatured alcohol before installation, and make sure that your scope tube is clean. Maybe wipe it down with some alcohol and let it dry as well, just to be sure. Also be careful not to drip any loctite onto the rings or scope tube themselves- only a tiny touch to the screws themselves. For the stop pin, I screw it almost all the way out through the bottom of the ring, and just touch it with the tip of the bottle. Enough to keep it from walking out, not enough to bleed out into the ring. These are steps you'll have to take with ANY scope rings you use on a magnum springer if you want your scope to stay put long enough to shoot a single tin of pellets without re-zeroing it...
Back in July I did my own full tune of my XS-28 in .177. Using a low end Leapers 4x32 scope I was able to consistantly punch holes through 24 oz. beer cans at 97 yards with H & N Barracuda 10.65 pellets. p.s. the cans were filled with sand.
I got a full tuned xs28 in .177, so smooth!!! It has the best trigger of any gun I own. No spring noise, just a nice Ker-thunk. Liked it so much that I sold my Disco and my NP Trail to buy one in .22cal.