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H110 is still reach compliant.

I am hoping to have a go at 100 and 200 with my .44 mag in the historics coming.

Not sure to try and stay over super sonic (H110, N110 or Ramshot Enforcer Loads) or stick with Unique.

How do the pistol bullets fair if they go transonic?

Scrummy

I use Bullseye, Unique or 2400. All are great in 38/357 (as well as the 44) so it is whatever I have readily available for that loading session.
Recently I have opted for using Unique (38/357 - 4.7/6.6gn) more than the other two, for no particular reason, and it works well.