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What is the difference between Norma and Lapua 338 Lapua Magnum brass?

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Old 05-21-2012, 08:33 PM
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Join Date: Feb 2011
Location: Nashville, TN
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Re: What is the difference between Norma and Lapua 338 Lapua Magnum brass?

Originally Posted by Sandwarrior View Post
I believe the new Norma .338 is different than the .338 Lapua.
Everyone please note:

There is a .338 NORMA MAGNUM cartridge and there is a .338 LAPUA MAGNUM cartridge. They are different. The .338 Lapua Magnum first came into being in the 1983-1984 time period. The .338 Norma Magnum came into being in the 2008-2009 time period.

This thread appears to want to know the differences between Norma Brass and Lapua Brass for the .339 LAPUA MAGNUM cartridge. Sandwarrior, you have introduced a new thought here which will introduce confusion to some following this thread.

Initially, it was found one of the weaknesses of the .338/416 cartridge was the web and sidewall just immediately forward of the web. This is because the cartridge is "unsupported" in this area. Lapua choose to redesign the cartridge by thickening and metallurgically strengthing the case in this area. According to Wikipedia, "Lapua tackled this problem by creating a hardness distribution ranging from the head and web (hard) to the mouth (soft) as well as a strengthened (thicker) case web and sidewall immediately forward of the web."

As has been pointed out in other posts within this thread Norma does not seem to have taken these steps. As a result you would expect Norma brass cases to be more susceptable to pressure issues and to have fewer reloading cycle (i.e. fewer numbers of reloads before casing unserviceability.)

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Old 05-22-2012, 12:12 AM
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Join Date: Oct 2009
Location: Thunder Basin, WY
Posts: 1,788
Re: What is the difference between Norma and Lapua 338 Lapua Magnum brass?

The Lapua brass accepts an RCBS #14 or equivelant shell holder. I believe the Norma brass may need the #37, or 416 Rigby shellholder.
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