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Annealing cases

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18 comments

  • grandman
    Does anybody anneal their rifle cases? I have been reloading for a while and have never annealed any cases and was woundering if anyone has and what are the advantages. How do you do it and is worth the extra work?
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  • bpost
    There are many threads on annealing cases; in the upper right there is a search tab, you can find a lot of information on annealing in them.

    I like to anneal it does help.
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  • bentley47
    Here is a link to the best discussion on topic I have seen.
    http://www.6mmbr.com/annealing.html
    I don't have the right equipment and I have not perfected the method to get it right every time, but I would like to. My 22BR brass has a very short life without annealing.
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  • jonk
    Hmmmm. I have mixed feelings on this.

    On one hand- IF You have some sort of rig to ensure case to case uniformity in the annealing process (there's a nice one on 6mmbr.com) then I'm all for it. Even if you do it one at a time, good results can be had- again, uniformity is the key. I would chuck the case in a drill and spin it to permit uniform heat around the case, and time it- say 5 seconds or whatever- then quench the case.

    HOWEVER- if you just blast the case from one side or 2 sides with a torch, you'll end up with inconsistent results from case to case, and that's not good. Neck tension will be all over, and while your annealed cases will have a new lease on life from brittle cracks in the neck forming, they will likely shoot looser groups than they did before annealing.

    Sort of depends, then. For pricey rare oddball cases I do anneal, for 30-06 or other common ones, I just shoot them until they crack, then scrap. Doing it well is time consuming and exact, but with proper due diligence it CAN help.
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  • Colonel Plink
    quote:Originally posted by jonk
    Hmmmm. I have mixed feelings on this.

    On one hand- IF You have some sort of rig to ensure case to case uniformity in the annealing process (there's a nice one on 6mmbr.com) then I'm all for it. Even if you do it one at a time, good results can be had- again, uniformity is the key. I would chuck the case in a drill and spin it to permit uniform heat around the case, and time it- say 5 seconds or whatever- then quench the case.

    HOWEVER- if you just blast the case from one side or 2 sides with a torch, you'll end up with inconsistent results from case to case, and that's not good. Neck tension will be all over, and while your annealed cases will have a new lease on life from brittle cracks in the neck forming, they will likely shoot looser groups than they did before annealing.

    Sort of depends, then. For pricey rare oddball cases I do anneal, for 30-06 or other common ones, I just shoot them until they crack, then scrap. Doing it well is time consuming and exact, but with proper due diligence it CAN help.


    I'm confused. I thought annealing was removing temper from metal. The way I was told to do this was NOT to quench them, as doing so makes metal brittle.
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  • bentley47
    Per several articles I've read, quenching affects most metals, but not brass. Quenching brass only serves to stop the heat from migrating from the neck/shoulder to the case head - it doesn't affect brass annealing whether it's air cooled or quenched.
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  • bpost
    You could say that annealing, done right is a solid benefit. Annealing done wrong offers no advantage.


    Personally I find the risk of annealing the head area to be over stated, bad if it happens, but over stated. it takes over 400 degrees to start changing brass structure. Unless you have the case mouth heated to the melting point I don't see how you can get that much heat down into the head. Of course quenching takes that remote possibility out of the equation.
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  • grandman
    6mmbr.com has a good article but it seems like you can screw up a case in a hurry if you don`t know what you are doing? I am going to research this more to see if I want to take this on or buy new brass.
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  • zimmden
    I anneal all my cases for 17PPC, 22PPC, 6PPC, 22-250, 17MIV. No neck splits in 5 years on these expensive cases with 20 to 30 loadings. I have several homemade annealing tips. Contact me at zimmersden@triton.net for details and info.
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  • cpermd
    I use a Brassomatic annealer for all of my rifles.
    I did add a third torch coming in from the center axle.
    It will do a 50 BMG case in 7 seconds
    308 takes 3 seconds.

    CP
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  • wpage
    Not for ammatures...
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  • Alan Rushing
    Going for consistency and conformity as always. Brass that is being manipulated much, benefits most.

    Cases annealed correctly have the potential of increasing case life. That's what I had been told and read.

    Annealing the brass also jives with the information from metallurgical sources.

    We had jerry-rigged a means of doing this, it was a slow and tedious process, and not an exact science the way we did it.

    We'd been more concerned with case life rather than case to case perfection nor the shot to shot consistancy of competiton.

    Most always, had to replace my brass when lost or "leant-out' or some unique reload glitch, that would take one or two out of action now and again. So I jerry-rig and don't look back, it's better than not.
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  • 5mmgunguy
    It is tough to do it by hand consistently...machine annealers do it much better but are expensive.
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  • grandman
    Anybody have an idea how much a brassomatic annealer cost? Seems that you can save on the brass if you do the annealing right, but the only thing is if it is cost effective to buy an annealer.
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  • zimmden
    Brassomatic costs $399.00. Yes the decimal is in the right place. Call me for info on how I do it. 231-420-1873
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  • CHEVELLE427
    quote:Originally posted by jonk
    Hmmmm. I have mixed feelings on this.

    On one hand- IF You have some sort of rig to ensure case to case uniformity in the annealing process (there's a nice one on 6mmbr.com) then I'm all for it. Even if you do it one at a time, good results can be had- again, uniformity is the key. I would chuck the case in a drill and spin it to permit uniform heat around the case, and time it- say 5 seconds or whatever- then quench the case.

    HOWEVER- if you just blast the case from one side or 2 sides with a torch, you'll end up with inconsistent results from case to case, and that's not good. Neck tension will be all over, and while your annealed cases will have a new lease on life from brittle cracks in the neck forming, they will likely shoot looser groups than they did before annealing.

    Sort of depends, then. For pricey rare oddball cases I do anneal, for 30-06 or other common ones, I just shoot them until they crack, then scrap. Doing it well is time consuming and exact, but with proper due diligence it CAN help.


    same here,
    been making 8mm out of 30-06

    some times they crack most times they don't. [^]

    and i don't shoot the 8mm as much as i need to [:(]
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  • Dumpster Baby
    I made something like this with a gearmotor. I hold the torch with one hand and control the application of the flame. The other hand places the cases on the holder and then tips them off the back into a canteen cup. It works very well and costs almost nothing if you can find a suitable gearmotor at low cost.

    After I got it built I tried it out with a box of .357 magnum cases I converted to .256 Winchester Magnum in a sizing die. In the past I had to carefully select which .357 brass to use because a lot of it would crinkle and crack when squeezed down in the .256 die.

    Annealing fixed that issue completely.

    DeSimAnnealerBox.jpg
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  • JustC
    this is the one I made with an exhaust fan motor, a rheostat, and holders made at a local machine shop.

    101_0829.jpg

    101_0828.jpg

    101_0826.jpg
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