Re: Leupold or Minox? 40mm or 50 mm Obj?
I can't tell you about the Minox, i've never owned one or been around one. But I can tell you about Leupold, I have eight of them in the house right now, ranging from a 1.5-5 on a .375 Ruger to a 8.5-25x50 MK4 on my 338RUM. I also have a 8.5-25x50 with varmint hunter's reticle on my 6-284, the reticle is great for wind holds, other than that I always dial elevation, I have used it to 500 w/holdover but nothing serious, just not precise enough for me. Leupold has the "Model" standard of customer service, people who go out of their way to make sure you get the best service possible.
The 30mm tube will yield more adjustment for those longer shots, the 50mm objective is best for light transmission in low light situations. I do have a 6.5-20x40 on my "go to" hunting rig, it works fine, but you can tell the difference. Depending on your stock you may or may not require a cheek piece, I can't say right now.