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338 norma reloading data

 
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  #1  
Old 12-14-2012, 05:33 PM
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Join Date: Mar 2012
Location: Iceland
Posts: 1
338 norma reloading data

Hallo

One year ago I decided that I „needed“ a semi custom 338 norma rifle , after the decision was made to build it was time to begin research on reloading data with Vihtavuori powder for 250 gr bullets , after a lot of search on the internet with no results I decided that I would have to do it myself and start from scratch. I did use 338 lapua data as a reference point.
The rifle is a blueprinted Remington 700 with 24” Lothar Walter barrel in 1-10 twist and custom muzzle brake and bedded in GRS varmint stock and topped with Zeiss 6-24x56 in Night force rings.

Norma brass ,bullet is lapua scenar 250 gr ,primer is federal 215 m and col is 88,64mm(3,490” ), bullet seeding is everything , this cal is not picky on powder at least with vv .

Vv 570

92=2880 fps
93=2930
94=3010 (stiff bolt )

I’m also testing vv560 and 225 Hornady sst and results will come later.
338 norma reloading data-039.jpg

The sweet spot, 3 shots 100 meters
338 norma reloading data-011-3-.jpg
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  #2  
Old 12-16-2012, 03:06 AM
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Join Date: May 2004
Location: Alaska
Posts: 428
Re: 338 norma reloading data

Nice looking rig, I really like the stock !!!

My 338 Norma Mag is almost done, hopefully before Christmas !
I went with a 30" 9.5 twist Brux fluted Rem Varmint contour attached to a Sako M995 TRGS and set in a KRG Whiskey 3 chassis !

I'm interested in your starting loads and the powders you used, would like to assemble a handful of rounds in 1/2 gr increments.

soon as it's done ..... from the smith straight to the range !!!
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  #3  
Old 12-16-2012, 10:40 AM
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Join Date: Feb 2012
Location: Boise, ID
Posts: 687
Re: 338 norma reloading data

Great looking rig. Keep us appraised as you do more testing.
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  #4  
Old 12-16-2012, 03:59 PM
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Join Date: Jul 2007
Location: Maryland
Posts: 440
Re: 338 norma reloading data

Speed be careful using 338 Lapua data as a reference, although the Norma is based off the same case it responds different with the usual powders for some reason.

The reason you don't see much info for the 250's is because the cartridge is designed aroun the 300 grain SMK. During development and testing R-22 and Ramshot Magnum were the go to powders for FPS and accuracy with top FPS going to RSM

My first one shot R-22 better and my second one shoots RSM @ 2800 FPS in the .3's consistently so I left it and just shoot it.

I tried all the usuals H-1000, Retumbo etc. great accuracy but FPS was slower than 22 and RSM.

PM if you are interested in loads for the 300's
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  #5  
Old 12-16-2012, 08:35 PM
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Location: polson MT.
Posts: 654
Re: 338 norma reloading data

Rimfire how many rounds before your first 338 norma barrel went bad ? Thanks Joe
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  #6  
Old 12-17-2012, 12:31 AM
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Join Date: Jul 2007
Location: Maryland
Posts: 440
Re: 338 norma reloading data

[QUOTE=new shooter;732807]Rimfire how many rounds before your first 338 norma barrel went bad ? Thanks Joe[/QUOTE


Got rid of it at 800 so I cant tell you how long they last. Built the new one on a custom single shot Pierce action. They were both super easy to load for not picky at all.
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  #7  
Old 12-17-2012, 12:33 AM
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Join Date: Sep 2010
Location: New Zealand
Posts: 308
Re: 338 norma reloading data

Has anyone tried the new R33 powder in the 338 norma.
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