Nation,
I have several "go to" scopes that are excellent in my opinion.
I currently run a Sightron Slll 10-50×60 on my Marauder, good glass, good Mil Dot reticle. I also have another Sightron Slll 10-50×60 on my Air Arms EV2, that model is the MRAD. Both are equally clear, track well, and hold zero. Excellent ranging properties from both of them. Both are Second Focal Plane
I also have a pair of Kahles 10-50×56 FT's. One that I bought brand new i have mounted on my RAW TM1000, and the other, I bought used, and was recently been refurbished and re calibrated from the factory before my purchase. That one sits on top of my Thomas FT. Love the scope, and it's reticle, also illuminated. Both Second Focal Plane. The one thing that is a little tricky, is rangefinding. It does not "snap in" like other similar power scopes. It takes a little practice and consistency on the users part in order to rangefind properly. One thing that I can attest to, over almost any other scope, is, I've never experienced or heard of any other Kahles owner complain over temperature shift with these scopes. Definitely my choice of a high end, quality scope, hands down.
I did own a Falcon 10-50×60, and that scope failed in the middle of the Crosman All American Field Target Championship one year. Was good, clear glass, tracked well, but something went wrong with the focus, thus the rangefinding capability failed. Never considered another after that incident.
Hope this helps
Tom Holland
Field Target Tech