I run 13 grains of little gun behind everything in the 40-50 range, standard hornet, prvi case.
You using a drop tube like gunner to get 13 gr. in a std. Hornet case?
DF
LOL, think I'm getting in 13.5 grs with only neck sizing about 1/3rd inch of the neck or measured bullet shank in the case, can't remember the exact number, but size die is set to do so.
That's why I started and finished with the 450 mag primers, I knew early on I'd be trying to ignite a heavily compressed pellet of lil-gun,
I need HEAT and a tough cup Man. lol