Need help!

[pistoleros]

i have an 540 gr Rhino solid bulllet in cal .510
does anybody know what the bullet weight will be
if i copy the bullet and make an bullet mould of it?

[Castaway]

If the solid is bronze and you were to cast pure lead, bullet mass would be right around 760 grains.  Harder alloys of course would be less, but not significantly so

[talon]

I'm not a whiz at math, but the Spc Grav of lead is about 27% more than copper... and bronze can be about 80-98% copper. So, a lead bullet cast to the same form as your bronze bullet would weigh about 680 gr (or maybe a little less). To make it weigh the same as your bronze bullet, you'd have to reduce the mold cavity's length by about 1/4". But, this is hair splitting. What's important is that lead and brass/bronze/copper fly differently out of the same barrel whether they are of the same length or same weight. And terminal ballistics are just as different. Suggest you give your project a little more thought before spending bucks having a mold made. Perhaps Mr Smith on the LBT board (the next one down on this forum's listing) can tell you more.  

[Cat Whisperer]

i have an 540 gr Rhino solid bulllet in cal .510
does anybody know what the bullet weight will be
if i copy the bullet and make an bullet mould of it?

By all means, look at the moulds already in production - there are probably 5 or 10 makers of moulds where you could find examples.  At least that would give you an idea of other's experiences.

Rifle or pistol?  Velocity?  Rate of twist?  
Flat base or gas-checked?
Punching paper or fur-lined critters?