338 norma reloading data

Discussion in 'Rifles, Bullets, Barrels & Ballistics' started by speed, Dec 14, 2012.

  1. speed

    speed New Member

    Messages:
    1
    Joined:
    Mar 31, 2012
    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.
    039.jpg

    The sweet spot, 3 shots 100 meters:)
    011 (3).jpg
     
  2. Swamplord

    Swamplord Well-Known Member

    Messages:
    1,005
    Joined:
    May 2, 2004
    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 !!!
     

  3. Mike 338

    Mike 338 Well-Known Member

    Messages:
    1,022
    Joined:
    Feb 4, 2012
    Great looking rig. Keep us appraised as you do more testing.
     
  4. Rimfire

    Rimfire Well-Known Member

    Messages:
    479
    Joined:
    Jul 14, 2007
    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
     
  5. new shooter

    new shooter Well-Known Member

    Messages:
    748
    Joined:
    Mar 19, 2006
    Rimfire how many rounds before your first 338 norma barrel went bad ? Thanks Joe
     
  6. Rimfire

    Rimfire Well-Known Member

    Messages:
    479
    Joined:
    Jul 14, 2007
     
  7. Rocky Mountain

    Rocky Mountain Well-Known Member

    Messages:
    386
    Joined:
    Sep 13, 2010
    Has anyone tried the new R33 powder in the 338 norma.
     
  8. Swamplord

    Swamplord Well-Known Member

    Messages:
    1,005
    Joined:
    May 2, 2004
    The trouble I have with RL 33 is finding it, I'd love to try it in my 338 Edge, 300 RUM and 338 Norma .
    You'd think guys that work in gunshops would know a little , most sob's haven't even heard of it much less the 338 Norma Mag , had one fat bastard arguing with me and claiming there is no such thing as a 338 Norma Mag only a 308 and 358 Norma until I produced an empty case out of my coat pocket !
     
    Last edited: Dec 17, 2012
  9. steelshooter

    steelshooter Well-Known Member

    Messages:
    118
    Joined:
    May 28, 2011
    How does the Norma Mag compare to other 338s like the Lap and RUM?
     
  10. Swamplord

    Swamplord Well-Known Member

    Messages:
    1,005
    Joined:
    May 2, 2004
    Ballistically really close in performance to the 338 Lapua... the Lapua has slightly higher velocity.. BUT ..
    barrel manufacturer, cut or button rifling, 5C, 5R, length, twist, powder, bullets, primers etc., etc., all have a play in velocity results..

    My reason for building one was I had an action with the proper boltface for the 338 Norma laying around and the Cartridge works very well in the AICS 338 cip mags