venomballistics
Member
I've used #2400 since the 1960's, but if I absolutely couldn't find any, I'd try Accurate #9. I used it on a very limited basis some years ago with cast bullet .357 loads. Burn rate is pretty close to #2400 and a little load development might be worth the effort.
I second this.
#9 is a little finicky as are most others in this burn rate range.
It's not quite as flexible as 2400, but it is dead on it's heels.
What it gives up in flexibility, it gains in energy. not a bad trade really