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Here is a typical 150 gr 308 bullet at a realistic 2790fps so simulating factory ammo zeroed at 200y
You can see it is all but dead on from 20y-50y so perfect for bush ranges no more than 2 inches...

I would recommend sighting in at 200 if you hunt bush and river flats slips farm edges etc.
20 shots without a break could definitely cause some rifles to start to wander.
Check all screws on the...