It appears that Solo1000 isn't the greatest handgun powder. I don't see it listed in any of my manuals for 40, and it's not listed for much of anything else either. The manufacturer doesn't list it either.
With a quick internet search, I saw a few people playing around with it in 40 and they posted some data. But there isn't much out there.
I once read in a gun magazine "If you can't find any data for a certain powder and cartridge combination, there is usually a good reason for it". I would take that advice in this instance and buy a different powder better suited for 40.
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