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You won't need any mods to get it shooting good enough groups on the range.
For hunting, out to "average 500M max shots", you need to make it easy to use.

There you've got to have:
Stability of...

I think you're right to set up all the "modifications" before you start.

When people talk about practice, sighting in, dial adjustment verification, trajectory, learning wind and so on, you really...