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338 Norma Review By Ward W. Brien

 
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  #113  
Old 04-05-2011, 01:36 AM
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Re: 338 Norma Review By Ward W. Brien

Quote:
Originally Posted by sp6x6 View Post
Google wikipedia, 338 norma mag, I dont know how to link and all that jazz. Show a picture of NM and lapua
Here we go:

.338 Norma Magnum - Wikipedia, the free encyclopedia
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  #114  
Old 04-27-2011, 10:14 PM
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Re: 338 Norma Review By Ward W. Brien

Quote:
Originally Posted by WWB View Post
The Barrel Lug that I use is 1/4" thick.
The Barrel is manufactured by "Mark Chanlynn" of "Rocky Mountain Rifle Works," and his phone number is as follows: (303) 823-6270. He is one of the Very Best Barrel manufacturers around and has been making them for 40+ years. He also apprenticed under "Boots Obermeyer."

The Barrel has a 1:9.1" Twist ratio and at the time was 28" long. The ideal length of the barrel is 26" overall, however at the time, the barrel was 28" overall.

The powder that I utilize at my elevation, (8200 ASL) is Reloader 22 and the primers are Fed 215M.

There are two accuracy nodes that I load, one is 82.5 grains which gives me 2649 fps and the other is 84.2 grains which gives me 2,785 fps. The lighter load stabilizes at 100 meters and shoots basically a hole. The 84.2 shoots bigger at 100 meters, approximately 3/8" but shoots exceptionally small at and beyond 300 meters.

The bullets utilized are the 300 grain SMK's and they are loaded IN THE LANDS .003".

I have another .338 Norma that I have been working with that likes a jump and shoots the same whether .005" or at .02". The group size is one hole but once in awhile jumps an 1/8". I have 37 rounds down that pipe, so in a few more rounds I'll start seeking out a trend.

The .338 Norma is The Best Cartridge that I have ever shot. It works so well and the barrel life is 2.5 times longer than the LaPua with downrange Accuracy about three times better. That is a Fact.
Ward can you explain why the barrel life is 2.5 times longer than the Lapua?
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  #115  
Old 04-30-2011, 06:04 AM
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Re: 338 Norma Review By Ward W. Brien

Quote:
Originally Posted by berryreed View Post
Ward can you explain why the barrel life is 2.5 times longer than the Lapua?
I think you already know the answer. No free lunch.
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  #116  
Old 04-30-2011, 07:04 AM
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Re: 338 Norma Review By Ward W. Brien

I too would like to know how you are getting 2.5X more barrel life out of the Norma vs Lapua, as case capacity is very similar, and ballisticly they are almost identical.
I don't beleive it, at this point.
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  #117  
Old 05-02-2011, 02:00 PM
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2.5x greater than what?

Sako TRG4 have a garanteed barrel life of 5000 rounds using match factory ammo.
Therefore a Sako TRG 42 in 338 Norma Mag would have a 12 500 rounds barrel life...

I'll buy that, and the Brooklyn Bridge ;)
Alex
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  #118  
Old 05-05-2011, 04:41 PM
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Re: 2.5x greater than what?

Quote:
Originally Posted by AlexF View Post
Sako TRG4 have a garanteed barrel life of 5000 rounds using match factory ammo.
Therefore a Sako TRG 42 in 338 Norma Mag would have a 12 500 rounds barrel life...

I'll buy that, and the Brooklyn Bridge ;)
Alex

I'm not backing up Warren because I don't know what the truth is. But, to say that the TRG 42 has a guaranteed 5000 rounds for the .338 LM, but doubt it would be increased to 12,500 rounds if it was a 338 Norma, is just a bad a statement if not worse. You don't know that and neither does Sako. I searched Sako's web, no where it states 5000 round guarantee for the lapua.
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  #119  
Old 05-06-2011, 12:33 AM
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Re: 338 Norma Review By Ward W. Brien

Sako TRG

see bottom of page

"The Finnish Army found out during a test/trails program and 7 years of actual service that the barrels of their Sako TRG-42's lasted 4000 to 5000 rounds with Lapua Lock Base B408 factory ammunition before showing impermissible accuracy decay. The Finnish Army consistent accuracy requirement for these rifles is ≤ 1 MOA at 1000 m. If this requirement is not met the TRG-42 gets a new .338 Lapua Magnum barrel. This is normal practice for active high performance precision rifle operators who regard barrels as expendable items. The continuous use of very powerful handloads (which results in higher muzzle velocities) resulted in much quicker throat erosion reducing the TRG-42 barrels accuracy life to 1000 to 2000 rounds."
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