Accurate Powders has two newer powders for handguns... no 10mm loads are shown but I'd be willing to bet there could be some potential.
No. 11FS is intended for full-power loads in magnum handguns and smaller capacity rifle cartridges. This double-base spherical propellant was developed with an eye toward personal defense and incorporates a flash-suppressant that substantially reduces muzzle signature in low light conditions. In the .300 Blackout, No. 11FS is capable of extremely high velocities with lighter bullets, making it the best propellant choice for shooters looking to maximize downrange performance. Made in the USA.
http://www.accuratepowder.com/wp-content/uploads/2010/09/load_data_11FS.pdf (http://www.accuratepowder.com/wp-content/uploads/2010/09/load_data_11FS.pdf)
TCM In 2017, Western Powders partnered with Armscor International to provide a canister-grade propellant for their innovative .22 TCM cartridge. Producing 2,000 fps at the muzzle with virtually no recoil, this accurate and fun little cartridge brings handgun performance to a new level for small game hunting and plinking. Accurate TCM also has a place with old favorites, with data for hunting loads in .357 Magnum, .41 Magnum and high-pressure .45 Colt cartridges. Made in the USA.
http://www.accuratepowder.com/wp-content/uploads/2010/09/load_data_TCM.pdf (http://www.accuratepowder.com/wp-content/uploads/2010/09/load_data_TCM.pdf)
Nice! TCM looks like it may get 200gr stuff up there like #9 but without having to squish powder as badly!
I just sent that pdf to my high pressure 45LC fanatic buddy.
Thanks for sharing!
Both say Made in the USA. I dont see this too often on powders.
Made in USA? Then it won't smell like cat urine. :P
Thanks for the info.
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Considering it's ball powder and made in the USA, that makes it a General Dynamics powder made at St Marks in Florida. They're the only ball powder maker in the US anymore. The Western Powder and Accurate pistol only ball powders are made by St Marks now. The deal with the Czech bunch went south when the value of the dollar made it unfeasible to do business.