Rotometals Hardball Alloy

[ksriverrat]

Any one using this regularly for 357 magnum? If so what mould & load?

[Harter66]

I don't normally shoot anything that hard aircooled I do shoot water dropped WW in mine w/LEE 358-150SWCs and 358-158 RNFPs . Both have been good for me in several guns in 38 and 357 loads w/bbls from 4-18in. Up to about 1600fps.

[ksriverrat]

Thanks for the reply!
I will try to find some thing they offer closer to the composition of wheel weights

[ShooterAZ]

I have bought and used it...before I learned about mixing. Now I buy Linotype and mix with pure lead to the desired hardness. 1 lino to three parts lead I'm told approximates WW. 1 Lino to 1 lead=hardball.

[runfiverun]

that hardball [also known as terracorp magnum alloy] and pure 50-50 makes a nice 1/3/96 alloy, that's pretty flexible.
you can mix that 1/2 and 1/2 mix with ww's 50-50 for heat treating and such or just add some sulpher to the alloy.
or by adding 2% more tin to the hardball alloy it makes a #2 alloy clone of 4/6/90, instead of 5/5/90.
it's what most every commercial caster uses.

[ksriverrat]

Thanks for the replies.
I am getting ready to purchase a good amount of alloy. Still not completly decided on what one.