Annealing Time ?

[Martin52]

From reading a few posts on this and other forums, the time the case neck spends in the flame of the gas torch seems to be between 6 - 8 seconds to achieve the right annealing temperature for the neck.

Using 308 Lapua brass, I find the 475 deg F Tempilaq pasted about 3/8 inch below the neck shoulder junction melts after 3-4 seconds. I use 700 deg F inside the case neck and this melts also at 3-4 seconds and goes black.

Prior to using Tempilaq I held the case in the flame for around 6 seconds to a dull red colour (in a darkened room) and had no problem with the cases.

Does this 3-4 second time seem too short to you guys ?


Martin

 

[BobLor]

Six of us all went in and bought a Bench Source Annealing machine and all of us ended up setting the dwell time in the flame to four seconds for .308 brass. Win. Lapua, Rem or Military brands all the same dwell time is what we found.

The Bench Source machine has worked extremely well and has annealed thousands of pcs. of brass so far.

B.L.

This is of course Propane gas and two torches and flame set to the instructions as to flame size and placement.

 

[nosualc]

I use a bench source machine @ 4.25 seconds per 6.5x284 case. Same for .308. Two propane torches set per the instructions. Those are the only two cases I've done.

My buddy's done some 6PPC and x47Lapua cases with it, but I don't know the times.

-nosualc

 

[40X Guy]

I am 4.5 seconds on my 6.5X47 cases with my Bench Source machine, and 5 seconds on my 6AI cases, a friend of mine who shoots a lot of 7MM Remington Magnum anneals his cases for 6 seconds. Seems like a rough rule of thumb that the bigger the case the more time needed.

Frank

 

[btm_54]

I have been setting my benchsource to 3.8 sec for 308, 30-06 and 300 Win mag

 

[DHD]

4.5 seconds for Lapua 308 Palma and 4 seconds for Hornady Match 308. I have some Rem 308 URBR brass that needs only 3 seconds as the necks are so thin. My shooting partner's 6mmBR takes 4 seconds and a 6.5 Grendel takes the same.

This was checked with Tempilac.

All are with a Bench Source.

 

[Longtrain]

I have annealed Hornady Match and R-P brass in 308 and WW brass in a 223

IMO the use of a temperature indicating substance such as Tempilaq to monitor the heating of the brass is required. Red glow in dim light is not a scientific measurement of the brass reaching the proper temperature for annealing the necks.

On test cases, a small paint of 750 degree Tempilaq on the inside of the neck and a long paint with 450 degree Tempilaq on the outside of the case from a bit below the shoulder to the base. BTW I'm using a Ballistic Edge Model 200, 3 propane torches.

In my setup the neck Tempilaq turns color in about 3 seconds and the 450 indicator doesn't change, showing that the neck has reached annealing temperature and the body hasn't, a good thing. After a few tests, I just use the 750 Tempilaq in the necks, knowing all is fine. Brass is then cleaned in Stainless steel media, resized and loaded.

Resizing is very consistent and results, I feel, have shown on the target in better bullet tension and case fit, etc.

Tony

 

[infantrytrophy]

When you guys state the time used on the Bench Source machine, the amount of heating depends on the flame adjustment of the torches, correct?

Can anyone comment on how you can adjust the flames so that your settings are repeatable?

Also, how long do the torches typically last? 1 hour? a few hours?

Thanks,

Randy

 

[Forum Boss]

As others have suggested, get the 750 deg Tempilaq and put it on the inside of the necks. This was recommended both by Darrell Jones, DJsBrass.com, who uses a benchsource, and by Jerry Brandon, who makes the Ballistics Edge machine.

The ideal dwell time will vary a bit based on your brass size, torch flame heat, and torch flame position/angle. It's always wish to test your set-up and dwell time with some old brass.

 

[hedditch]

I would like to jump in here. I have painted the inside of my necks with 750 degree Tempilaq and as soon as the flame hits it, it turns black and I mean instantly. Some things I have noticed are: The 450 degree Tempilaq I appy on the shoulder just starts to melt just as the brass cycles out; Some kind of a ring starts moving down the case and where it stops remains a sorta blue ring and I have seen this same ring in approximately the same place on Lapua or Norma brass, I don't remember which; Also, a yellow flame starts to appear from the case mouth just as my Bench Source cycles. I am using two flames and heat the 6 BR & 6 PPC cases 4 seconds. Comments? Advice? Criticisms? Your observations. I tried using one of those electronic heat sensors to measure the temperature and the one I have is worthless for that job.

 

[Webster]

From reading a few posts on this and other forums, the time the case neck spends in the flame of the gas torch seems to be between 6 - 8 seconds to achieve the right annealing temperature for the neck.

Using 308 Lapua brass, I find the 475 deg F Tempilaq pasted about 3/8 inch below the neck shoulder junction melts after 3-4 seconds. I use 700 deg F inside the case neck and this melts also at 3-4 seconds and goes black.

Prior to using Tempilaq I held the case in the flame for around 6 seconds to a dull red colour (in a darkened room) and had no problem with the cases.

Does this 3-4 second time seem too short to you guys ?


Martin

I use 5 seconds with a propane torch. Very little annealing takes place 5-7 seconds at 700-750F. I have read all the literature thats out there. Worked in a metallurgy lab for 45 years. The ends of the case neck were starting to get bright red in 10 seconds. I decided. To play it safe and anneal for 5 seconds. I don’t care if it doesn’t meet someones criteria. I have been shooting the same 200 Lapua cases for 9 years. About 500 shots a year. Must have about15-20 reloads each case. Had about 3 split necks and that was because I was annealing after 3-5 reloads. 6BR Varmint rifle I always shoot groups under. About ,350” If I do my part. Glowing red is about 1050F.

 

[emmett]

The templar turns black because direct flame has hot it and caught it afire. Direct the flame away from the mouth a nd don't leave any on outside of case to ignight. I myself prefer a lower flame and 6-8 seconds time . I feel that I can control the temp better and still never melted the 450 templar.

 

[338 dude]

From reading a few posts on this and other forums, the time the case neck spends in the flame of the gas torch seems to be between 6 - 8 seconds to achieve the right annealing temperature for the neck.

Using 308 Lapua brass, I find the 475 deg F Tempilaq pasted about 3/8 inch below the neck shoulder junction melts after 3-4 seconds. I use 700 deg F inside the case neck and this melts also at 3-4 seconds and goes black.

Prior to using Tempilaq I held the case in the flame for around 6 seconds to a dull red colour (in a darkened room) and had no problem with the cases.

Does this 3-4 second time seem too short to you guys ?


Martin

Yes So quit messing around

 

[Martin52]

Yes So quit messing around

lol - the AMP wasn't around in 2011 when I started this thread.