As noted above, Hornet brass is thin. Cases don't last long. I get best results using a Lee collet neck size die. With fire-formed neck sized brass, I am able to get 13.2 grains of Lil Gun into cases with the powder level about 1/8" below the mouth of the case. I use 40 grain plastic point bullets with that load. Remington cases are a bit bigger, and I can get 13.5 grains into a fire-formed case.
