Giraud-Bench Source Annealing Temps

[TexIndian]

Just got my new Giraud annealing machine (Sweet!) and have a question for those who use it or other annealers. What temperature do you shoot for on the neck? The instructions for the Bench Source machine say to go for 650 and the Giraud instructions say to go for 750.

THIS oft-cited article from 6mmBR seems to agree with Giraud. It says 650 will anneal a neck after but only after 15 minutes, while 750 or 800 is needed to do it in a few seconds. From this it would seem that following the BenchSource instructions would be doing you no good.

Just curious what is actually working best for those who have tried and tested the results. I'm using Tempilaq paint to measure my temps.

ETA: Just FYI, the Giraud site says the wait time is around 6 weeks, but I got mine in about 10 days.

 

[TexIndian]

Re: Giraud-Bench Source Annealing Temps

Nobody?

 

[Jeffvn]

Re: Giraud-Bench Source Annealing Temps

I run between 700-750 on my gizmo, for a few seconds, and it seems to do just fine.

Jeffvn

 

[doubled]

Re: Giraud-Bench Source Annealing Temps

I run 750 tempil on the inside of the next and 450 on the outside and 8 seconds(ish) on my giraud is the sweet spot to liquefy the 750 in the neck and just a bit on the shoulders. The regulator is barely cracked open and you should let about 30 seconds go by with the flame on to get the pressures and flame steady and consistent.

 

[Kiba]

Re: Giraud-Bench Source Annealing Temps

On my Giraud I have the propane valve just barely cracked open such that the full diameter circumferential ring of flame is even with the end of the torch head. I find that a much easier way to gauge the torch setting than trying to eyeball the length of the inner "pointed" flame. That's just about the right setting IMO for 223 & 308 variant cases. With a 223 it takes about 6.5 seconds to just melt the 750F templiaq before the case is dropped out of the machine and with 308 and 22-250 cases it takes about 8 seconds.

It's much easier to make small adjustments to the motor speed than to make small adjustments to the torch. The torch valve is somewhat touchy and it takes a good 15-20 seconds for the flame to stabilize at the new valve setting. It's much easier and more consistent to make fine adjustments using the motor speed.

FYI... the propane bottle is supposed to go on the inside of the machine. Not only is it more protected the little lip at the bottom of the enclosure will keep it from sliding down.

 

[Deadshot2]

Re: Giraud-Bench Source Annealing Temps

I'm not using a "machine", but with my method I use the 750 degree temp crayon. Heat while turning until the shoulder/neck junction just melt the crayon and then drop into tray (no water) to cool.

Case life is excellent with as many as 30 loadings on my .308 brass.

 

[Wheres-Waldo]

Re: Giraud-Bench Source Annealing Temps

I shoot for 775 with my annealer.

Do NOT go above 800 F*, but you must exceed 750 F*

http://www.6mmbr.com/annealing.html

<div class="ubbcode-block"><div class="ubbcode-header">Quote:</div><div class="ubbcode-body"> With this setup, the neck will actually reach a temperature between 750 and 800 degrees. Remember, it's the combination of time AND temperature that does the job. We have raised the temperature sufficiently to be able to anneal the case necks in 6 to 8 seconds.</div></div>

<div class="ubbcode-block"><div class="ubbcode-header">Quote:</div><div class="ubbcode-body"> The critical time and temperature at which the grain structure reforms into something suitable for case necks is 662 degrees (F) for some 15 minutes. A higher temperature, say from 750 to 800 degrees, will do the same job in a few seconds. If brass is allowed to reach temperatures higher than this (regardless of the time), it will be made irretrievably and irrevocably too soft.</div></div>

 

[TexIndian]

Re: Giraud-Bench Source Annealing Temps

Thanks for the info. I was planning on using 750 as the target temp but the info in the BenchSource instructions had me scratching my head. And thanks for the tip on the bottle location, Kiba. I wondered why it was not secured better where I had it. Instructions? I don't need no stinkin' instructions!