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Thread: 358 Norma

  1. #1
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    Default 358 Norma

    Can anyone recomend a good load for a 250 gr. partition out of a 26 inch tube? My dad is trying to figure out if he should get this gun or not. He can't seem to find any reliable reloading specs. Thanks in advance.

  2. #2
    Moderator Paul H's Avatar
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    Default

    I shoot a 350 Rigby magnum which is a similar round with slightly less case capacity. My best load is 66 gr of Varget over a 250 hornady for 2700 fps.

    There is load data out there, and 338 win mag data is close, as is 375 H&H data for 270 grainers being close to 358 Norma w/ 250's.

    Varget, RL15, 4350, all great powders that will easily push 250's 2700 fps and produce tight groups. With the 26" tube, he shouldn't have a problem hitting 2800 fps.

  3. #3
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    Default

    Thanks Paul

  4. #4
    Member Float Pilot's Avatar
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    Default Great cartridge

    Here are some loads that I shoot from a 21.5 inch model 70 that was rechambered to wonderful 358 Norma mag.

    Powder IMR 4350
    Brass New Norma
    Primer CCI 250 mag
    Bullet 250 grain Speer spitzer

    79.6 grains for 3 shots 2880fps, 2901 fps and 2896 fps....KINDA HOT 2 inch group at 100...not so great

    78.0 grains for 3 shots, 2720fps, 2713fps and 2718fps, VERY ACCURATE 2.7 inch group at 300 yards.

    Norma Factory Load::: 250 grain semi-spitzer, 2685fps, 2700fps and 2690 fps. Pretty accurate ammo...One inch at 100 yards

    225 grain Sierra Game king boat tails:
    Powder IMR 4350,
    Brass new Norma
    primer CCI 250

    79.0 grain IMR 4350 ==2839fps, 2865fps, 2837 fps, 2823 fps, 2892 fps, 2815fps,
    Heavy recoil, not very accurate and not any betetr than the heavier Speer flat base bullet. 3 inch group at 100 yards,,, not worth the pwoder to shoot any more...

    Barnes 275 grain old semi solid
    same powder and brass as before.
    74.0 grains = 2562fps, 2542fps, and 2548 fps. OK accuracy. 1.75 inch at 100 yards
    Floatplane,Tailwheel and Firearms Instructor- Dragonfly Aero
    Experimental Hand-Loader, NRA Life Member
    http://site.dragonflyaero.com

  5. #5

    Default 358 Norma

    I think you'll find H4350 gives better loading density in the short 358 Norma case where space is at a premium than IMR 4350. 75.5 gr H4350,WW case, 250 gr. Nosler Partiton, F215 primers, gives 2820 fps out of my 23" barreled Sako. 69.5 gr. H4895, 225 Nosler Partiton gives 2950 fps. 76.5gr. R 19, 280 gr. Swift A Frame, 2710fps out of the same rifle. One of the many beauties of the 358 is it's ability to use faster powders with 225's & 250's for less powder burned/less felt recoil. H4895, R 15, VV150 and others all work well. All the above loads will shoot 1" or less @100 yds. in my rifle although recoil with the 280 Swift will get your attention in a 9lb. rifle.
    Hope this helps.
    sbsmith

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