My
Leupold Mk LR/T works fine, and I can't say my
Nightforce 5.5-22x56 is any better from a glass perspective. However, the Nightforce has a steel tube, and both looks and feels better suited to a .50. The extra weight won't be an issue on your gun.
On the downside, when you adjust magnification on the Nightforce, the eyepiece rotates - with flip-up covers, this is irritating as it screws up whatever direction you wanted the cover to flip to. On the Leupold, it's just a ring on the tube - the eyepiece does not move.
Also, Leupold makes the
Alumina covers, which are head-and-shoulders above anything else from both a function and appearance standpoint.
And the Leupold has 10 more MOA of adjustment, which can only be a good thing.
Both of them 'shoot the box' equally well.
If I were doing it again, I'd likely skip the Nightforce and just do another Leupold. Having said that, I've never looked through one of the legendary US Optics or S&Bs - but, regardless of one's budget, I wonder about diminishing returns.
PS: is that the same Steyr I saw at Target Sports last week?