If you are shooting at deer, and you are shooting out to 300m with a 308, I would sight it in at 25mm to 40mm high at 100m. It will be about zero mm high at 200m and maybe 50mm to 75mm low at 300. The zone where you want to aim to drop a deer is about 250mm round so if you aim slightly above the centre of that the bullet should impact inside that critical circle out past 300m without altering your scope at all.
If you are failry new to shooting , which it sounds as though you are, then practise as much as you can as well. Most shooters I knwo would struggle to hit a dinner plate target at 100m until they had had quite a bit of practise.
Other than that, you have got a good scope and the range finding Binos will help once you get better at it.
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