Nitro Express load data always welcome. I used RL-15 with filler for a while in a .470 NE Merkel, but found I liked H4831 better in that one too. If doing it again with a foam wad filler I would use Varget, about grain-for-grain same as RL-15, but better temperature stability and less lot-to-lot variation.
Well Thank You Sir Ron, expecially any NE load data for 458 cals ; ]
If the guys at Hammer get around to making you up a solid, a 458 cal flat, or cup nose at around 405gr would be absolute perfection, they make a little cup nosed 137? gr bullet in 9mm, that little booger would be a barrier hole drilling bone breaking exiting all vitals for sure and certain on two legger felons hellbent for a new air conditioned bed that slides in the wall down at the coroners office.
