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oven thermometeres

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26 July 2010, 00:26
M 98
oven thermometeres
Can anyone point me in the right direction to where i can buy a themometer to use in an oven to oven heat treat bullets
im oven heat treating my 416 cast proj , in a little electrical fan forced oven , and i need to get a themometer to get the oven/bullets to the correct temp for consistencey from lot to lot

any help would be much appreciated

Daniel
26 July 2010, 03:28
Von Gruff
Daniel, I found that the bullets were the best thermometer when I was oven HT. I simply put a few of my discarded bullets from the same batch in a seperate wire basket and placed them in the oven using the slump test to determine heat required. I have a handy graph in my RCBS cast bullet hand book that gives aproximate temp's for the various antimony and tin percentages in the alloy. I would set the oven to the recomended temp for 10 min and then increase in 5 degree rises for ten min till I got 'slump' and back off a 5 degree from that. This gives the best HT Never used a thermometer other than the oven marking and that only as a guide.



Von Gruff.


Von Gruff.

http://www.vongruffknives.com/

Gen 12: 1-3

Exodus 20:1-17

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26 July 2010, 21:45
M 98
Garry
thanks, never thought of tacking heat treating cast bullets that way
getting my self an oven this week so will give it a try

Daniel