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Was finally able to work up a couple loads for my 1895 Trapper/Hybrid. It took 25 grains of Accurate 5477 to get the Hornady 410 grain Sub-X to 1060 fps. Also tried some Unique with the Missouri bullet co. coated 405 grain hard cast. Was kinda surprised when only 12 grains got it to about 1070 fps. Would like to try some Trail Boss but haven’t been able to find any local and not willing to pay high shipping fees. Even though they’re hearing safe, they still make quite a bit of racket going down range. The Hybrid is my first experience with a centerfire suppressor and the 45 calibers (Govt and Bushmaster) are not nearly as quiet as the 350 Legend I’ve tried it with so far.
Unless the air temp is 15°f, 1070fps is not supersonic.
The CAS data link you were given shows the sweet spot at 11 grains of Unique for a 405gr cast bullet. If you want to run even slower then go up in bullet weight - I used to run 500gr at 750fps.
