Well I have most of a pound of Lil Gun powder and I was wondering if it might work in my 20 Tactical with a 32 gr bullet and hopefully a target velocity of around 2500-2800 FPS.

20 Tactical is a 223 necked to 20cal, slightly less case volume than a 204.

Any thoughts about the suitability of this, is it possible or is it best just left as an idea?