I have been using Unique up until now.
I want to try either PP or BD, and am hoping I can get some answers from people who have used both.
Glock 20SF 4.4" and 6" barrel
Looking for information for loading 180 (XTP, Speer GD, Sierra) and 200 gr JHP (XTP)
Starline brass, Winchester LP primers
1) which burns cleaner?
2) which meters best?
3) which is more accurate?
4) which do you like better?
5) which powder gives off the lower muzzle flash/muzzle blast?
Thanks
I really like both of these powders... here are my answers to your questions:
1) I'd say Power Pistol, easy... however, if you are loading FULL POWER stuff, you can get the BD to burn completely. Really not an issue with either, though.
2) Power Pistol meters GREAT. Its like sand (almost as good as the SILKY SAND texture of AA7 but not quite). Blue Dot meters fine, however, but I find it chucks little flakes out of my powder drop from time to time on my setup. Not a huge issue as it seems that several powders do this.
3) I've HEARD that BD is more accurate, however I've not SEEN this necessarily. Both of these Alliant powders should be extremely accurate. I'd probably still give the accuracy edge to BD.
4) I'm honestly not sure. I've heard SO MANY PEOPLE say they LOVE Blue Dot, and I agree, its a great powder for 10mm.... HOWEVER, I'm liking Power Pistol MORE AND MORE lately. Its honestly taken EVERYTHING I've thrown at it and begs for more. Very high performance and economical, to boot. I'm going to do some more experimenting with full power 200gr bullets from a 6" tube and I'm pretty sure BD will rule that roost, however, Im convinced that PP will outperform BD with light to mid-weight bullets.
5) Easy... Power Pistol isn't quite as loud or flashy... but its still flashy.

Blue Dot creates a relatively massive blast and flash, whereas PP produces a nice, brilliant white flash (but not as bright as BD). Neither are well suited for defense loads. For anything else, who cares?
The only thing I'd like to add is that I hear BD is INVERSE TEMPERATURE SENSITIVE. For a powder that seemed to be the perfect hunting load powder (powerful and known to be very accurate) I was quite upset to hear this. What could be worse than loading up some hot loads in the summer for upcoming season, only to find out the loads you made are peaking to DANGEROUS pressures in 5 degree winter weather on your deer stand?? The jury's still out on this. I'd be interested to hear more from someone who has experienced this issue.