Well...Alcohol m-i-g-h-t have effected some aspect of the molecular chemical arrangement which governs burn rate.
Hence, the admonishion of there being possibly an unpredictable condition now for any Smokeless Powder which has been exposed to Alcohol.
So, one would be obliged to say, on principle, that the best thing to do is toss any suspect Powder, and, use fresh supplies.
If you had dumped the once dried Alcohol exposed Powder back into the Can, and the Can still has quite a bit of fresh Powder in it...probably just shake well and distribute it well, and no one would ever know the difference.
But, if you had kept the exposed Powder seperate, I'd say toss it, and play it safe...otherwise, who knows, might be a bunch of duds, underpowered, poor ignition or uneven burning, inconsistent results, some too 'hot', stuff like that. Might not be, but could be. I have no idea which way Alcohol could effect the burn rate, or how evenly all the exposed Powder was saturated or dampened.
Your time would be better spent aspiring to certainty in results in every detail being meticulous and as right as possible, as ethos, rather than being tempted by any compromise.
The Alcohol exposed Powder has been ( at least theoretically ) compromised.
Or, use it to load 'test' Rounds, and mark them so...see what they do!
Start low, work up...chrono them.
Then, load same exact Loadings of fresh Powder, chrono them, and compare...keep a Chart.
Who knows? But if you do want to use the exposed powder, being 'Scientific' is always the best excuse.
I Love Science...it gives one permission for just about anything.
Lol...
And true!