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Runaway temperature

Posted: 20 Sep 2020 16:05
by Old Scribe
Hello guys! I've been away for a bit, but have passed through a time or two. I simply had a few changes in my life's routine and took on two small jobs that weren't small. I was retired there for a bit.

Anyway I decided to cast some .38 special wad cutters in a new mold I hadn't tried.
After heating up my Lee bottom pour, bullet mold, and checking the temperature I wanted to use, I cast about 75 bullets when I notice the temperature was starting to increase. I turned it down to where I wanted it and resumed casting.

Long story shortened, the temp would not hold and kept rising-turn it back down-kept rising. I've had no trouble with this pot over the 15 plus years save an occasional dripping spout. Could the rheostat be bad?

Good to be back!!
Steve

Re: Runaway temperature

Posted: 20 Sep 2020 19:18
by larryw
Howdy Old Scribe, good to see 'ya again.
Yea, that would be my guess, pretty simple setup,
nothing else in there ????
I was just think this morning about firing up my pot
& restocking my wadcutters. I love my little Ideal
2 banger, 148gr button nose.

Re: Runaway temperature

Posted: 26 Sep 2020 06:50
by AlaskanGuy
checkout that rheostat... like Larry says.. aint much to em, but I have never heard of this before. heard of them not heating up or dropping temps.. not increasing.. anything is possible.

Re: Runaway temperature

Posted: 26 Sep 2020 09:36
by horseman
Sounds kinda normal to me. Been a few years since I had a Lee pot but I seem to remember I'd turn it up all the way to get to temp. (using a Lyman Thermometer) then I would spend the rest of the pot full turning it down a bit, but only to a point (maybe around three towards the end ?) but if I added alloy or sprues back in as I was going along I may possibly have to turn it back up :D . However, not seeing how your pot is acting this is merely an account of how the one I had reacted. I did have a rheostat go bad in my first Lee 4-20 pot but it wouldn't heat. Pretty simple system. You'll get if figured out and back to working. ;)

Re: Runaway temperature

Posted: 28 Sep 2020 17:17
by Old Scribe
Thanks Guys! I ordered and received very quickly a new rheostat and installed it. Now we're cooking 140 gr SWC's and back in business.

Re: Runaway temperature

Posted: 28 Sep 2020 17:18
by Old Scribe
:t Thanks to Titan for the fast service too!

Re: Runaway temperature

Posted: 28 Sep 2020 18:18
by larryw
Old Scribe wrote:Thanks Guys! I ordered and received very quickly a new rheostat and installed it. Now we're cooking 140 gr SWC's and back in business.
Yea buddy,,, Now your cooking with gas??? Er,, Uh,, I mean electricity???
I know, I know??? Shut up Larry ...