I've been tinkering around with 5.7x28mm reloading for the past year, utilizing mainly HS6. I have some good pet loads developed with help from the good people on the Fivesevenforum, but there has been little to no official information available. I just wanted to let people know that there is now official data from AA and Ramshot (mfg of the powder in FNs factory loads)
AA:
http://www.accuratepowder.com/data/5.7x ... 20only.pdf
Ramshot:
http://www.ramshot.com/powders/loadguid ... 20only.pdf