springback after sizing

[Oklahoma Rebel]

I am gonna have someone with a lathe spin a .458 boolit sizer out of a 7/8 bolt that fits my press, any tips, should it be a shallow straight angle,convex,concave? and will there be any springback to compensate for,for instance if the inside diameter is .458 will the boolit come out .4585 or .459?

[.22-10-45]

When I had Corbin make reloading press type bullet reducing dies, I specified dia. to be based on pure lead..when sizing 20-1 lead-tin alloy springback is around .0002"-.0003" of an inch.

[Oklahoma Rebel]

ok thats probably going to be plenty within my tolerances.do you have any suggestions on inside angle or know how commercial sizers are?

[44man]

Check with fellas here, we have EXPERTS to make what you want.
Personally I would not use a bolt, better is tool steel that can be hardened and lapped for a perfect size for the lead you use.

[bosterr]

I can get .0005 spring-back if I wait at least 3 days before I size a 395 grain .475 boolit cast from wheel weights.

[Hickok]

Look up "Buckshot" here on this sight. He does outstanding work, at a good fair price.

[44man]

Look up "Buckshot" here on this sight. He does outstanding work, at a good fair price.
There you go. I forget who does the best. Forgive me, too old.
I stand by our people if you need something.
Thank you for helping.

[Victor N TN]

The amount of "spring back" or elasticity that you have in a particular piece of brass has to do with how many times it was fired with hotter loads and the last time it was annealed. The more times it has been fired, the harder less elastic the brass is. The stiffer the cases get the easier it is to split.

[Hickok]

There you go. I forget who does the best. Forgive me, too old.
I stand by our people if you need something.
Thank you for helping.Any time .44 man![smilie=s:

[44man]

The amount of "spring back" or elasticity that you have in a particular piece of brass has to do with how many times it was fired with hotter loads and the last time it was annealed. The more times it has been fired, the harder less elastic the brass is. The stiffer the cases get the easier it is to split.
Not brass my friend, a boolit through a size die.

[newton]

I made a sizer one time, for my muzzle loading boolits. Used a bolt like you were saying. I made the mouth of it with a very long taper. I don't know the exact specs, but there only needs to be one small area that actually sizes down to what you want. I just kept on honing, then checking boolits, to see where I needed to stop.

I am all about supporting other members on this site. I try to as much as possible. But sometimes its just nice to make something(or have something done locally) yourself. After all, we could all buy cast boolits from vendor sponsors, but instead most of us cast them ourselves.

[geargnasher]

Depends on antimony content (if any) and how long they sit after casting. Also, how much you're sizing down. I've had 40:1 alloy cast at .460" bounces back to .4583" or so after passing a die that measures .4579". WW alloy at .461" comes out about .459" after passing the same die.

Why have them made when Lee sells exactly what you're after plus a bullet catcher for around $20?

Gear

[Victor N TN]

Not brass my friend, a boolit through a size die.

My mistake. I guess I had brass on my mind. My apology.

[44man]

No problem, I have brass on my mind too, brain is turning green! :coffeecom

[Oklahoma Rebel]

thanks for all the information everyone, geargnasher, you have found that WW alloys have more memory or bounceback? also I am also considering the lee die/container, just in a bad spot moneywise, that's what got the gears turnin'