Discoloration on Lapua cases

[Brian564]

I get it that the discoloration around the neck of Lapua cases is a sign of quality, but I don't know that exact reason. Can you tell me the scientific explanation of this phenomena and how it makes the brass better? Thank you.

 

[ohiohunter]

Its just annealing, you can anneal any brass but it doesn't make it lapua quality.

 

[MudRunner2005]

I get it that the discoloration around the neck of Lapua cases is a sign of quality, but I don't know that exact reason. Can you tell me the scientific explanation of this phenomena and how it makes the brass better? Thank you.

It is not a sign that it necessarily "makes it better", although Lapua brass IS the best brass money can buy for many reasons.

That discoloration is the tale-tell sign that the brass has been properly annealed after forming and manufacturing, ensuring that the brass is not too hard, and will properly form to your chamber the first time it is shot, which will increase accuracy, and longevity of the brass life. Annealing also softens the brass, keeping it from splitting necks and getting work-hardened. Lots of people anneal their brass after a set number of firings.

http://lmgtfy.com/?q=annealing+brass

 

[Brian564]

Thanks for the information. I am now reading about annealing and learning a lot about its benefits for brass.

 

[ohiohunter]

Thanks for the information. I am now reading about annealing and learning a lot about its benefits for brass.

Read thoroughly. Over annealing can be dangerous, an aspect I overlooked and now have a pile of scrap brass.