Re: Best Propellant???
I like Hodgdon, and Alliant powders best.
RL15, RL19, RL22, and RL25
Retumbo, H1000, H4831, H4350 , H4895 and Varget
Varget, H4831SC and Retumbo would be the first three I'd try.
I believe they had H1000, H4831, H4350 and Retumbo in the new load development package deal, 1-4oz jug of each type, which might be worth a try if you don't already have it all on the shelf just yet.