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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

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You are right, I must have been thinking of something else regarding the 42gr charge. May be hot to start but probably close to good with the 350gr bullet.

I did look the No.2 in my Kynoch reprint and there are three bullet/charge variants:
Hollow 400/65, Solid 450/70, and Solid 480/76

Also, I measured the bore of my Dickson Henry and it does taper from .450" to .447" about 4" from the muzzle and then .448" at the muzzle.
I dont know if the loosening at the muzzle is to help the patch start its release or if it is wear from something.

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