Annealed case ammo > General Discussion

Posted: 5/19/2008 9:01:26 PM EDT

I bought Fiocchi NATO ammo a couple years ago and it has a discolored band around the neck that I guess is annealing marks. I'm relatively new to shooting, only been into it for a couple of years. I recently bought some Fiocchi brass case factory ammo that is not annealed. What it the purpose of the annealing process on cases?

Posted: 5/19/2008 9:03:52 PM EDT

[#1]

When you work with metal a lot it becomes brittle. Annealing allows the crystalline structure to rearrange itself making it softer, but less brittle.

Posted: 5/19/2008 9:04:27 PM EDT

[#2]

If I am not mistaken, ALL ammunition will have annealed cases, but commercial ammunition is polished to make it less visible.

Posted: 5/19/2008 9:04:51 PM EDT

[#3]

Quoted:
When you work with metal a lot it becomes brittle. Annealing allows the crystalline structure to rearrange itself making it softer, but less brittle.

Is it done then to allow reloading of the case or to avoid a ruptured case in the chamber?

Posted: 5/19/2008 9:05:17 PM EDT

[#4]

The military brass only shows the annealing due to the fact is is not tumbled off afterwords I believe it is some sort of requirement in the "milspec" ........I hate using that word. The ammunition you have has simply gone through another polishing / cleaning process.

Posted: 5/19/2008 9:05:29 PM EDT

[#5]

LOOK HERE .......

Posted: 5/19/2008 9:07:26 PM EDT

[#6]

Quoted:

Quoted:
When you work with metal a lot it becomes brittle. Annealing allows the crystalline structure to rearrange itself making it softer, but less brittle.

Is it done then to allow reloading of the case or to avoid a ruptured case in the chamber?

Alot of guys anneal the case when they want to resize brass. It makes the metal softer so it goes through the dies easier.

Posted: 5/19/2008 9:10:06 PM EDT

[#7]

Quoted:

Quoted:
When you work with metal a lot it becomes brittle. Annealing allows the crystalline structure to rearrange itself making it softer, but less brittle.

Is it done then to allow reloading of the case or to avoid a ruptured case in the chamber?

The main reason is that the case is brittle after forming and there would be a higher chance of it rupturing. Without the annealing process, it wouldn't have enough ductility to expand/contract during and after firing.

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