H335 would be my first choice for that bullet, or see if you can find some surplus WC844, it is the canister powder version of H335. Watch out for scammers selling it online.
Hodgdon\’s online Reloading Center has data for IMR4064. 23.0 starting, 25.7C Max. C=compressed powder
It is a little slow burning for that application, but may work near the upper end.