New Winchester Powder 572 that may show good promise in 10mm ::)...the older SR 4756 was discontinued and this 572 made with newer technology and standards may be real interesting...
The video is of particular interest with powder manufacturing and shipping and changes that have been made to maintain products.
http://www.thefirearmblog.com/blog/2016/04/26/new-winchester-powder/ (http://www.thefirearmblog.com/blog/2016/04/26/new-winchester-powder/)
Interview with Christ Hodgdon 2016 video
At the end of the video Chris Hodgdon mentions new things for 2017 :o ;D
watched part of the video,have to finish it later sometime. My 'go to' powder is SR4756 since the 70s' for 38sp/357M and 44sp/44M. Along the way its' use has expanded for in 9mm,40S&W,10mm,41M. I have quite a supply of it as I've been gathering it over the past few years since it dis-continuation was announced. Eventually my supply has to run out.