124HP RMR
8.5 grains of Accurate #7 is as hot as I went. My Springfield Hellcat 3.1\” barrel pushed 1209fps ES29 SD12, kinda on the +p side. And With 8.0 grains 1149fps ES17 SD6.
124HP RMR
5.7 grains Autocomp 1149fps ES13 SD5.
That was with the same Springfield Hellcat with 3.1\” barrel. I did go hotter but the SD\’s just got to crazy with the Autocomp.
124HP RMR
6.0 grains of CFE Pistol, same Springfield Hellcat 3.1\” barrel, 1197fps ES39 SD15. Any hotter was just a waste, bullet spread just got too crazy.
124HP RMR
6.0 grains of Ramshot Silouette, Same Springfield Hellcat 3.1\” barrel, 1151fps ES27 SD11.
124HP RMR
5.4 grains of Ramshot Zip, Same Springfield Hellcat 3.1\” Barrel, 1151fps ES36 SD13.
Those are the only powders so far that I used RMR\’s 9m 124HP\’s that were a little on the hot side. I have done other barrel lenths that are 4\”, 4.5\”, and 5.2\”. I listed the short barrel 3.1\” Hellcat to show that reaching the 1150fps minimum recommendation in a short barrel pistol is possible! But to continue using those rounds as practice rounds, probably not. With the Springfield Hellcat, That 8.5 grain Accurate #7 was throwing brass 3 lanes over.
In my Canik 5.2 barrel pistol, 8.5 grains of Accurate #7 was 1359fps.