Either bullet would work fine, with the lighter bullet having a bit flatter trajectory.
In general, factory 8mm isn't loaded "to the max" because of the number of lesser quality old military rifles. The ballistic coefficient of 8mm bullets isn't all that great, either. Thus the 8mm is not as flat shooting as cartridges like the '06, but don't let that bother you for "basic hunting".
Inside of 300 yards, the 8mm will work just as well as anything, for deer. I'd recommend the heavier bullets for black bear.
The main thing is to practice enough to learn the behavior of the load you select, and work on learning to estimate range. Within 200 yards, just "point it and pull" and don't worry at all about trajectory. Don't hold over; don't hold under; just shoot.
Hope this helps,
Art