358 315 mould mods

[jbunny]

i recently bought a 358315 mould for my 357 mag rifle project. this mould
casts a 204 gr gas check round nose. i chucked the mould in the lathe and
took .107 thou of the top and took the gas GC part off it now a plain base
and casts 183.5 gr rn bullet. i did'nt like the loooonnnng unguided nose
on that thing so i made a little tool and and modified some more. i added a
band to guide the nose into the rifleing. the pic should tell the story.
jb

this is after i machined the top of the mould.

this is the tool i made to make the guide band

in this pic u see the tool in the mould and the before and after bullets with
the band. the band is .351 thou and the bore in my barrel .350 thou.

 

[Andy]

Nice work! I've milled off the GC from a couple of molds, but never added another band. You have a unique mold - let's see how it shoots.

 

[jbunny]

Andy' i'm waiting for WSS to ship my NEF 357 mag. this is going to be my test bed for lots of experiments. i'm still playing with zinc and have learned a lot.
will post on that when i have the alloy down pat. i converted my 4 cav 44 mould to a top pour for this zinc casting. the base on the bullet is just as
important as the crown on the barrel. i has to be true with no voids and dings.
later
jb