I’ve never had a Chronograph but am fortunate to be able to verify on a large plate at 565yds.
I zero at 100yds.
Gestimate velocity and put it into my app to get me onto the plate.
Tutu with the velocity to get the right dial up reqd to get on the bull and save it.
Drop chart done.
No reason you can’t do the same with 100 yd zero and verify at 320 on a tall target ? Unless I’m missing something.
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