The reason you go through so many rounds here on Vancouver Island is because you're typically shooting at deer in dense brush while they're moving, not sitting in a blind with a scoped rifle. I can't count the number of times I have been walking up some logging road, saw a deer butt before it half trotted into the side of the road. You look into the bush and there's just absolutely nothing, so you sit and listen, and then you hear something and try to actually see the thing. Once you catch a glimpse, it's 30 yards away and you can barely see it but you get a headshot opportunity and miss. This is how it usually happens, there are no perfect shots and there is always stuff in the way. Scopes are practically useless considering how they'd be out of alignment within the first hour and they would be too slow to acquire your target unless set from 1-3x, you might as well use irons.