Both of my Holland 500 3 1/4" BPE regulate with cast lead GC LBT .511 bullets of 350 grains over
54 grains of 4198 and two Kynoch foam wads.

Components sourced from Midway and wads from "Trader Keith". The wads are the ones Kynoch uses for
.400-500 diameter bullets.

A shooter friend also uses that load to regulate in his Holland and a Rigby. One is a 3 inch, so
case length doesn't matter with use of Kynoch wads.

So here on Oahu 4 guns regulate with that load. We shoot steel plates hung at 50 and 100 yards every Sunday.

If you are on Oahu, come on Sunday to the Koko Head Shooting Complex and shoot our guns.