Bryan
I am waiting for warmer weather so I can enjoy shooting . I want to have a smokeless load to add to my 44 wcf loads in the past I have used Unique and it worked but I was wanting a powder that filled the case and was low pressure .
The only smokeless powder that fills the case and has the lowest pressure is Reloder 7. However, those pressures push the normal limits. I think H4198 comes in second, also pushing normal pressure limits. All depending actually bullets used and the seating depth of those bullets.
Here are the Reloder 7 tests I made.
https://docs.google.com/spreadsheets/d/1cZyKKXVyHq9as9uFJiko5yReJ9a-ER32YsENTgJGJs4/edit#gid=819756635 Noted in the notes section shows if it is a case capacity load, meaning the bullet sits on top of the powder but not necessarily firmly.
Here are the few H4198 loads I tested of which none are noted as a case capacity loads.
https://docs.google.com/spreadsheets/d/1cZyKKXVyHq9as9uFJiko5yReJ9a-ER32YsENTgJGJs4/edit#gid=1350502736There could be more out there somewhere but I just never tested everything I wanted to test and some powders I wanted to test have been discontinued.. Since Reloder 7 gives me both normal 1,350fps velocities at normal pressures as well as a tad hot loads at 1,400fps to 1,500fps for stronger action rifles with decent results, I decided to stay with it, especially since it is the most accurate loads for my firearms.
IMR-4227 gives me decent results as a High Velocity load powder so that is my second choice.
Unique is my second choice for normal loads and third choice as an over-all powder for the 44-40.