New mould casting problems

[Broad_head]

Hi All
This is my first post and I am after some advice. I have made a new bullet mould (steel) for a paper patch .43 black powder cartridge. Even after giving the mould time to heat up my cast heads have wrinkles and don't look good. I am using pure lead fluxed with bees wax, heated in a Lee bottom pour melter. Does my my mould need air vents? Any advice would be welcome.

[country gent]

Thats a lot of surface I would consider vent lines Maybe every 3/16" -1/4" . I have done them with a 4" fly cutter with a 60* threading tool in it. turn by hand step over and repeat. They only need to be .003-.005 deep.

I would also look at the cavity under magnification to make sure it isnt from the cutter.

[trapper9260]

Thats a lot of surface I would consider vent lines Maybe every 3/16" -1/4" . I have done them with a 4" fly cutter with a 60* threading tool in it. turn by hand step over and repeat. They only need to be .003-.005 deep.

I would also look at the cavity under magnification to make sure it isnt from the cutter.

You right needs some vent lines. For how it looks.

[ShooterAZ]

Vent lines might help, but wrinkles usually tell you that you need more heat. Pure lead needs to be run HOT, as in 800* +.

[popper]

Nose pour needs vents.

[Cosmic_Charlie]

Try holding the mold firmly against the bottom pour spout. Nice job on the mold, not many have the moxy to do that.

[dondiego]

Welcome to our blog! You might just fit right in!