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I've just started setting up for casting for my Black Powder musket and thought, why not cast for my JM 1895SBL in 45-70

The only molds available to me are Lee and I am a little confused as to the appropriate mold to cast 405Gr bullets. I have been gifted a Lee Double Cavity Bullet Mold (457 Diameter) 405 Grain HB (73430790374) which being .457 would seem to be correct for 45-70.

However, I note that Lee also lists a single cavity Bullet Mold (459 Diameter) 405 Grain HB (734307902681) specifically labelled 45-70 Govt.

Any guidance would be appreciated.
 

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I have not seen the 405gr .457 HB. I have the 405gr. .459 HB. It shoots good in my 1895GS full size(no sizing). When shooting cast bullets you want a few thousands more diameter to seal the rifling and for rifling bite into the lead.
 
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