It works if you keep it dry. I've seen it go from instant fire to mis/hangfires while sitting a few hours on my truck seat while I was range-shooting on a humid, misty, 45 degree day.

If you take a few extra loads out hunting for the day, don't return those vials to the powder jug.. shoot em' or toss em'. You also have to watch your warm breast pocket stuffed with those vials of extra pre-measured powder. Don't let those vials get warm, cold, warm again.

The powder works ....but it's tricky to keep dry & fresh. Too much hassle for me - even though my Omega loved the FFF version when it shot it being dry.