I switched from W-W and R-P Hornet brass to PPU and noted PPU was noticeably thicker/heavier and doesn't hold as much powder. Mine's a K-Hornet and I am using Lil Gun. My observation is the difference in case capacity is less than 1/2 grain between the different brands of brass.

I'm loading 14.0 - 14.3 gr Lil Gun with the 40 gr V-max. My rifle is a Ruger No. 3 with a long throat and my charge fills the case to 1/16" from the mouth and the bullet is seated way out.

13 gr Lil Gun is a pretty common Hornet load but with PPU brass, it wouldn't surprise me to need to reduce that slightly.

Last edited by JGray; 11/06/22.