Lil' Gun powder, small pistol primers, 35gr hornady VMAX worked best in my rifle.
YMMV.
-nosualc
Rick, did you just run the "K" reamer to punch it out to the improved chamber?
Dellet, your HiWall is a near twin to mine. See my post from the other day, HighWall Hornet.Another “K” fan. Still hit’s them as far as I can see them.
View attachment 1148367
View attachment 1148368
Lil' Gun powder, small pistol primers, 35gr hornady VMAX worked best in my rifle.
YMMV.
-nosualc