Annealing as a method of uniforming neck tension
- Thread starter TQB
- Start date
Annealing only helps with "neck tension" in terms of spring back. The more work hardened over time the necks become, the more springback. Regular annealing (like after every firing) will help maintain the same amount of springback over time and therefore, you'll get more consistent neck tension. The other attribute of annealing is it helps produce consistent grip on the bullet, which can be felt when seating your bullets.
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Ned Ludd
Silver $$ Contributor
Arguably, annealing cases that have a different number of firings might not make the neck tension as uniform as annealed cases with the same number of firings. However, it will likely make the neck tension (interference fit) more consistent than not annealing at all, and it should definitely not make the neck tension any worse.
Along with regular annealing, powdered molybdenum applied inside the neck with a Q-tip before seating the bullet will help with a more consistent bullet release as well as stop any cold weld.
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either anneal after every firing or never anneal is a good rule of thumb in my opinion. Annealing cases with different amounts of work hardening will make the ductility consistent which will make the bullet release consistent. I have annealed and not annealed with both flame and a AMP and the only time I ever had issues were when I relocated and a lot of my cases with different numbers of firing were mixed together.
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Ccrider
Gold $$ Contributor
Often wondered why a case that is hardened/fired more would not require more annealing time. Ultimately, one would think that a particular setting will anneal the case only to a certain point. As a result, what happens if you were to anneal a bunch of cases all fired a different number times let’s say two, three or four times at the same setting? Do they all get softer and softer after each anneal, or do they all reach a maximum point of anneal?
Someone with a hardness tester would have to anneal and test different samples to really determine
the answers to the questions.
The results may only be applicable to the particular brand of brass tested as you really dont know what alloys different manufactures are using.
the answers to the questions.
The results may only be applicable to the particular brand of brass tested as you really dont know what alloys different manufactures are using.
foxguy
Gold $$ Contributor
D-4297
Gold $$ Contributor
Maybe the "term" isn't anneal , as much as , "normalize" . By annealing brass that has been fired a different amount of firings , the "known" is that they would be of different work-hardness values , and doing multiple annealing's at the same setting should re-normalize the structure of the brass . If allowed to draw-down normally , between annealing's . Perfect ? No. But a closer average of hardness .
What do you use to apply this with, or, how do you apply this?
How Induction Annealing Works | Under The Microscope | AMP
View the latest articles from AMP Annealing. Get tips and tricks from our R&D. Here we upload articles to provide your the best possible information on innovations in the annealing process.
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It should if done properly.
156HV were returned to the same hardness as 141HV (both down to 98HV)
I just use a Q-Tip to "paint" the inside of the neck, doesn't take a lot.
If they get softer each time, they weren’t annealed the first time. Annealed is one very specific state of recrystallization.
Ccrider
Gold $$ Contributor
So, was the sequence in the chart that you tested the fired brass first, then annealed, then sized, fired using the same load and retested?How Induction Annealing Works | Under The Microscope | AMP
View the latest articles from AMP Annealing. Get tips and tricks from our R&D. Here we upload articles to provide your the best possible information on innovations in the annealing process.
It should if done properly.
View attachment 1296098
156HV were returned to the same hardness as 141HV (both down to 98HV)
I’m not a metallurgist, nor a chemist, nor a competitor. And I’m at a stage in life where much of my projectiles are basic, my brass is someone else’s discard, but my prep and reloading are fastidious, detailed, methodical and thorough.
I am convinced that the greatest contributor to the proven precision of my reloads can be directly tied to annealing my brass. With a torch, electric screwdriver and metronome.
So yes, I firmly believe in the ability of annealing to baseline mixed brass and to uniform neck tension, and it has been my experience that the time I spend at these tedious tasks has paid handsome dividends.
Your mileage may vary; mine has been excellent.
I am convinced that the greatest contributor to the proven precision of my reloads can be directly tied to annealing my brass. With a torch, electric screwdriver and metronome.
So yes, I firmly believe in the ability of annealing to baseline mixed brass and to uniform neck tension, and it has been my experience that the time I spend at these tedious tasks has paid handsome dividends.
Your mileage may vary; mine has been excellent.
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