Linotype Casting Temp

[B R Shooter]

I use a pot and ladle, and have a Lyman thermometer in the lead. Just curious why the scale shows lino at temp close to 500, and WW are higher. I try to keep the temp at/around 600, but would I get better results with lino at a lower temp?

[Conditor22]

the harder alloys have a lower melting temperature than pure lead and COWW.

Casting with linotype I usually go around 670 - 680°

https://i.imgur.com/OnPNr23.png

[JonB_in_Glencoe]

The rule of thumb is, the "starting point" is to have the alloy (whatever it is) 100ºF above liquidus temperture. Since there are many other factors involved (like how efficient your pot is, your casting rhythm, mold block material, sprue plate design, ambient air temp, wind/fan air flow), so you may need to have a higher alloy temp.

[B R Shooter]

Great, thanks. I've been in the range while casting. Of course I'm assuming the thermo is reading correctly, but what it shows casts good bullets.

[fredj338]

The rule of thumb is, the "starting point" is to have the alloy (whatever it is) 100ºF above liquidus temperture. Since there are many other factors involved (like how efficient your pot is, your casting rhythm, mold block material, sprue plate design, ambient air temp, wind/fan air flow), so you may need to have a higher alloy temp.
^^^THIS^^ I used to cast from lino when I got it really cheap back in the day, it cast beautiful boolits. I would run it at 600deg. Today it is mostly range scrap @ 725deg.