I reload the small 9mm case........
did the 115 and 124gr bullets then tried the 135gr and then moved
up to the large Speer 147 gr. TMJ that really filled the case up
and left minimum room for all my powders.

I was thinking of maybe going to the 165 gr bullet for giggles but
I picked up some Berry 147 gr RN bullets and had a rude awakening.
I was no longer able to use Unique or Red Dot due to the lost case volume.
I have yet to load this bullet for test but it looks like only a ball
type powder is going to work with this super long bullet for high fps.

I was able to get 4.5 grs of Unique in the TMJ at 1.13" OAL but with the longer
Berry RN bullet that amount shrunk down to 3.8 C grains, with a OAL of 1.13".

Good luck with your loading ideas.