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Thread: Data required for .308 150grn Sierra Gamekings using VitN140

  1. #1

    Data required for .308 150grn Sierra Gamekings using VitN140

    Has anybody got any data for 150grn Sierra Gamekings in .308 using vit N140?

    cheers

    Jason

  2. #2
    Jason,

    Anywhere between 46 to 48 grains should work a treat. It's getting a bit hot around the 48 grain mark though.

    Good luck,

    Tim

  3. #3
    For 150gr Hornady SSTs I use 45grs of N140 which gives an MV 2740fps in my T3

    Check out the Sako website. It is the only manufacturer that gives you the powder and load they use in each cartridge. And they use Vit powders. When I'm working up a load I refer to it but start a couple of grains lower.

  4. #4
    According to my Vihtavuori reloading guide the 150gr RN Hornady bullet can be driven at 2840fps with 46.3gr of Viht. N140.

    VIHTAVUORI NOTE :- `The optimal powder loading is generally some 5% less than the absolute maximum given in this brochure. This decrease in powder quantity reduces the pressure by about 10% but the velocity by only 3-4%`.

    MY NOTE :- Loads greater than the manufacturer states could seriously damage your health !
    Also remember that different primers can also raise pressures to a dangerous level.

    HWH.

  5. #5
    44.0gr N140 seemed just magic with several 150 -155gr bullets and in several rifles. Might not be the fastest, but then again you don't need to worry about running high pressures on a very hot day.
    My 308 easily shoots 2" groups at 300m with cheap flat base Hornady sp.
    edi

  6. #6
    Distinguished Member tartinjock's Avatar
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    Quote Originally Posted by ejg
    44.0gr N140 seemed just magic with several 150 -155gr bullets and in several rifles. Might not be the fastest, but then again you don't need to worry about running high pressures on a very hot day.

    edi
    With you on that, up to 43.5gr, the groups were not tight, at 44gr they just seemed to group perfect, at 44.5gr, they grouped the same, at 45gr they opened up again so I stuck with the 44gr.

    That's getting pushed out of a T3 Tactical.

    TJ

  7. #7
    Cheers for the advice guy's I'll roll me some rds tonight starting at around 43grns and work up.

    Thanks
    Jason

  8. #8
    Some useful info on reloading 150gr Gamekings can be found on the link:

    http://www.6mmbr.citymaker.com/f/Sierra308Win.pdf

    DP

  9. #9

    308 loads in N140

    Try this Mate

    http://www.championshooters.com/Viht...ding-data.html

    http://www.lapua.com/fileadmin/user_...Winchester.jpg


    Best of Luck, sure you will get what you need here !

    Remember Start Low work up steady.


    Regards
    Steve

  10. #10

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