No one is going to call him names or anything (at least they shouldn't). But he really does need to shoot the rifle to do a proper sight-in before hunting. You can speculate about ballistics all you want, but without at least a few shots downrange to see where the bullets are actually hitting, it's all a big ??????

Now I have boresighted muzzys and found that I was pretty close at 50 yards, at least close enough to take a deer. But it is not always like that. For example, the first muzzy I bought was laser boresighted by one of the guys at the gunshop I bought it from. First time out on the range, I was hitting like 12" low at 50 yards before I started adjusting. So you really just don't know for sure....