Refering to the P/H volunteer.I shot next to David Monk at the 1979 Capt.Heaton 1000yds event at Bisley when he shot with one of the two proto-type .451" Volunteers. It was a hammer rifled RIGBY form Marked 11.The other was Marked 1. He used a Lyman mould which I believe was designed for the rifle.I still have the mould.It is No.457125DM casting at 452. I shot with a Ratchet rifled .452" COOPER AND GOODMAN CBL used as a ML And came away with the Silver.I had Davids rifle for many years when he stopped shooting.I believe the rifle is now in Scotland. David went on to Manufacture is own rifles.THE MONK RIGBY originally using barrels rifled by the late Duncan Bedford before he used ones by I believe M.T. before he stopped shooting. He won the event by quite a large margin..