At least slug your bore and better still take an impact cast of the freebore.
That will tell you which make of 158 gn mould will suit your gun.
Half and half is a good starting point but I suspect 1-3 pewter to lead will be fine.
Lead for Casting
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All handloading data posted on Full-Bore UK from 23/2/2021 must reference the published pressure tested data it was sourced from, posts without such verification will be removed.
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All handloading data posted on Full-Bore UK from 23/2/2021 must reference the published pressure tested data it was sourced from, posts without such verification will be removed.
Any existing data without such a reference should be treated as suspect and not used.
Use reloading information posted here at your own risk. This forum (http://www.full-bore.co.uk) is not responsible for any property damage or personal injury as a consequence of using reloading data posted here, the information is individual members findings and observations only. Always verify the load data and be absolutely sure your firearm can handle the load, especially older ones. If in doubt start low and work your way up.
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Re: Lead for Casting
Come on Bambi get some
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Re: Lead for Casting
I just use backstop lead. Most of it is pistol bullets anyway. .22rf lead is good as it contains a small amount of antimony so it can be heat treated pretty hard (research "precipitation hardening"), but you will probably find it will work ok in your application as is. In feeding my .45 M1911 I got down to using virtually pure lead for the bullets, this was before i was criminalised for legally owning such a nasty thing of course.
Tin does not contribute much to hardness by itself but does increase strength without sacrificing to much ductility, which is why it is used for making tankards and gives lead better flow properties, which is why it is used for casting toy soldiers. Modern made tankards haven't been made of true lead / tin pewter for some time, due in part to the forming processes used that don't need the material to have the same ductility. That plus the fear of lead contamination.
Tin does not contribute much to hardness by itself but does increase strength without sacrificing to much ductility, which is why it is used for making tankards and gives lead better flow properties, which is why it is used for casting toy soldiers. Modern made tankards haven't been made of true lead / tin pewter for some time, due in part to the forming processes used that don't need the material to have the same ductility. That plus the fear of lead contamination.
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