Don't over-scope your hunting rifle with a 10X glass with a 50 mm objective. The purpose of the scope's magnification is to allow you to see the target, so more isn't necessarily better, it depends what you're shooting at and from how far. If black bear and moose are your targets, they aren't hard to see at the ranges they're typically shot. A wolf out on a frozen lake might be a bit more challenging, but still not something you need a varmint scope to see.
The physical size of the scope should be in scale to the rifle, but at the same time, the bigger scope the more fragile it is likely to be, and the higher it must be mounted to clear the barrel, the more susceptible it is to damage. If your target is a big game animal, a low powered variable is pretty hard to beat, so consider a 1.5-5X, a 1.75-6X, a 2-7X or a 2.5-8X. Choose your reticles to be visible in low light without battery illumination, if you always count on the battery, it could let you down when you really need it.
At the range, once you're sighted in, set up your shooting scenarios to replicate shooting conditions in the field. If you place time limits upon yourself, and shoot from field positions, such shooting can be very challenging.