Team.
I have been trying to develope a 'mil spec' cast load for my No4 MkII to use in service rifle shoots. Velocity and bullet weight need be with +/- 6% of Mk VII ball; 2440fps and 174gr.
Today I shot the rifle with the following load:
CBE 316 175 GC, oven heat treated WW + 2% babbit, BHN 23.
Sizing: .312 on front driving band, rest .314
47gr AR2209 (H4350)
WLR primer in RP cases
OAL 75mm
Velocity 2390fps
This is at 50m only but shows potential and the load is well within spec. Note the shot to the left was operator related. Ahem.