When it comes to scopes, I have had some "big name" scopes fail me at critical times. A scope is one piece of equipment I do NOT want to be faulty EVER in a hunting situation! You can still pull off a hunt if a a number of your pieces of equipment go out, but if your scope fails, even in a situation where it's been abused (such as falling) it can cost you the animal you worked so hard for. I would put reliability at the top of my list when looking for a scope.
For the past 30 years Leupolds have NEVER cost me an animal, and I trust them. There are more expensive and more premium scopes, but Leupold has always done the job. Speaking of not failing when abused, I shot my Mountain caribou back in the dark ages (1986) with a rifle topped with a Leupold after running down hill after the caribou. I lost my footing and both me and the rifle took several summersaults down the mountain. I literally caught my rifle as it was bouncing past me. I told my guide after that, that he must have been laughing watching that, and he said "No I wasn't, I would have had to pack you out". Ha ha. That shot was after 20 days in some tough country. NOTE: I am older and hopefully a bit wiser now, and I would never recommend shooting a rifle after a spill like that without checking it out first, particularly for an obstructed barrel.
After that, I tried a few different set-ups, had some bad experiences with scopes, and I kept going back to Leupolds. I have had two warranty issues with Leupolds in 30 years. One was a bent scope tube after dropping it on concrete, they repaired it at their cost. The other was a tight, but functional, adjustment screw that they repaired at their cost.
I have Vortex Razor for a spotting scope and two pairs of binoculars for my sons. I have had one warranty issue, it was a loose part rattling around inside my brand new top of the line Razor spotting scope. Their warranty is amazing, and I regularly recommend them for spotting scopes and binoculars (I did just the other day), but that loose part shook my confidence in one of the the pieces of equipment (a scope) that I never want to fail. Optically the Vortex spotting scopes have been great, but I will have to say that the fit and finish and "feel" of quality does not measure up to the Swarovski spotters I have owned, but with Vortex's no questions asked warranty I am willing to live with that due to the excellent cost/performance. Again, I can pull a hunt off if my spotter has some issues, but I won't take chances with a scope on my rifle.
This year, I finally got myself to branch out again on scopes. I wanted ballistic compensation with the turrets (something that might come in handy with that 30-378

to push the effective range of my 300 WSM out to around 800 yards. For a couple months I studied the reviews of the top brands of turret type scopes, particularly in the area of turret tracking repeatability. I will be putting a Nightforce NXS 3.5-15x50 on my 300 WSM in large part due to their reputation of extreme reliability, even in combat situations. I didn't go with the 5.5-22 power scope that most guys chose, since 5.5X is a bit high for quick shots at close range. The 3.5X gives me low enough magnification for close range and the 15X adequate magnification for longer range than I plan to shoot in a hunting scenario. I am just doing my initial set-up with this scope and have no time on it yet.