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That seems a lot of drop, very slow....your rifle may have generous chamber dimensions dropping pressure and speed perhaps.
Handloading for it would be the go ideally but maybe trying some hornady...

That aint right.
Zero at 200m
You will be 2-3inch high at 100m 6-12 inch low at 300.

Non bonded bullets are a better bet with the reduced velocity from the shortened barrel and extended range.

Frangible projectiles like the sst nbt eldm will do more damage at range but may require...