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I agree if your shots are going to be 150m or less, preferably even 100m or less like most bush hunters would encounter.

The draw back to using a 100m zero though is that if you see the odd deer...

That would be if you're a dial twidler would it not? Personally, not being one of the former, I've always sighted in at 200m and never had any problems out to 300m with a 7mm/08 and .308 which is...