Originally Posted by 380Seecamp
I stuffed some cases full of W296 for one of my Glock 20s just to try it, and the ammo fired fine, the gun cycled OK, but accuracy was mediocre.
When the 10mm first came out, I tried 2400 & 4227, both far too slow for complete bruning & good accuracy, not to mention pretty low vel. BlueDot or a powder in that burn range will work pretty well from midrange to wild. Longshot works for me, good accuracy & vel. BlueDot is decent. HS7 was good, no longer made & AA#7 works well too. SOme guys like PP, just haven't tried it. I can use LS in my 357sig loads to, so I've pretty much stopped looking for a 10mm powder.