well, 6.5 power at 50 yards is a bit much for some. On the other hand I hunted with a fixed 6 power for years and never considered the power to be a problem. I guess I'd be really happy with a 5-25 range, but I have no problem with a 6.5-20. I actually hunt, with all rifles, with the scope set on about 8 power, but that's on open ground.
A couple of years ago I did have a coyote at about 50 yards. I put the scope on him and saw fur. Don't know what part of the coyote the fur was on. Dang scope was still on 20 power. I hate it when I do that. I'm sure I cranked the power down, but can't remember if I got the coyote or not.
I probably wouldn't use that scope for big critters in tight hunting areas. More likely I'd go to the 4-16 or the 4.5-14's I have on some other and bigger caliber rifles. I'll shoot a coyote (or shoot AT him) at 500 yards or more, but I keep the big critter shots to 300 or 350 max unless it's a perfect opportunity with great light and not much wind. I might go to 400 in the good conditions, but honestly it isn't likely I'd do that. I rarely, if ever, take 'maybe' shots on a deer. Just doesn't feel right to me.