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Most AA9 I can stuff in any 10mm case is about 12.3gn and still seat a 200XTP to book length. I will say that’s probably a good thing as a mid-range load of AA9 in my 500 Magnum was HOTTTT!!!!, and the cases were so tight they needed to be drifted out of the cylinder. I found the same with some of the available AA7 data in other cartridges so I always start way low and watch the chrono very closely.
For my light castings, 145-175gn I like aa#7, Power Pistol and BE-86. For 180’s and up I like AA#9, Longshot and Blue-dot.
I’ve been waiting for the TH10 also. My guess is that unlike the TH45 which is nearly identical to the TH9 and TH40, the 10 has undergone a redesign to beef it up a bit to handle the cartridge. I’ve heard the 10 doesn’t have a de-cocker like the others which is another indicator that it’s not the exact same pistol design. In the mean time I picked up a TH45 to tide me over.
