Thanks guys.
I am going to start with 32 gns of 4198 consistent with Siefried's formula of 40-44% of original BP load (80gns) in 4198. 42 gns might be a bit hot even though you are using 350gn instead of the original 480gn.
My Henry rifled barrel goes .461" as best as I can measure it at the muzzel. My 467gn mould throws 50/50 ww/pure lead bullets at .463' which should be perfect.
Has anyone got a NFB load ?
Fraser