Favorite Black Powder substitute?

[M-Tecs]

Perhaps some of you long-timers here may recall that I did some experiments with ammonpulver smokeless propellant about 18 years ago. Ammonpulver is not a black powder substitute, that stuff will disintegrate a black powder firearm like any other smokeless propellant. However, one property of ammonpulver is that its pressure can be controlled to some extent by highly diluting it with another very mild propellant

https://castboolits.gunloads.com/sho...and%20grenades.

https://castboolits.gunloads.com/sho...ht=ammonpulver