If you have had success loading subsonic rounds in a 30-30 using Hornady Sub-X 175 grain bullets I'd appreciate it if you shared your preferred powder and load data.
My go to when wanting to load rifle subs is unique just because that was the standard i learned from the castboolit guys that said most pistol powders will work, some are a little more case sensitive than others here is a website with good info to start with
Reloading Data for cast bullets, result of lever gun accuracy studies on cartridges: 357 Magnum, 41 Rem Mag, 44 S&W, 44 Russian, 44 Magnum, 444 Marlin, 45-70 Goverment, Pistol Powders, Large Capacity Rifle Cases
www.gmdr.com
its using cast bullet but still a good starting point, i have never loaded 30-30 subs mostly bigger 45 cal rifles and blackout, my preferred blackout load is 9 grains of imr4227 under a 240 grain, 300 blackout data is probably a good starting point as well
