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Win 748 for 308 Winchester?

Discussion in 'Handloading and Reloading' started by Lone_Gunman, Nov 12, 2007.

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  1. Lone_Gunman

    Lone_Gunman Member

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    How well does Winchester 748 work for 308 Winchester?

    I like the idea of using one powder for all my 223 and 308 needs. But how does 748 compare to Varget, etc for 308?
     
  2. Grumulkin

    Grumulkin Member

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    I've used Win. 748 in the 308 Win. & it worked OK but IMR 4064 worked better for me so that's what I use. Varget would probably ge another good choice.
     
  3. GunTech

    GunTech Member

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    What bullet? There are a number of loads for 308 and W748 that work fine, and it meters really well.
     
  4. Bad Flynch

    Bad Flynch Member

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    WW 748 can shoot quite well in the .308 Win or 7,62mm NATO cartridges, but it is much better with lighter bullets, say 168 grains or less. I had a National Match M1-A that liked that powder really well with Sierra 168 gr MatchKings. 150 grain hunting bullets would work quite well, too.
     
  5. Lone_Gunman

    Lone_Gunman Member

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    I will be loading Hornday 150g SST bullets for hunting whitetail deer. How would 748 work for that?
     
  6. GunTech

    GunTech Member

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    Assuming commercial 308 brass:

    Code:
    Cartridge          : .308 Win.
    Bullet             : .308, 150, Hornady SST InterLock 30302
    Cartridge O.A.L. L6: 2.800 inch or 71.12 mm
    Barrel Length      : 24.0 inch or 610.0 mm
    Powder             : Winchester 748
    
    Predicted data by increasing and decreasing the given charge,
    incremented in steps of 1.124% of nominal charge.
    CAUTION: Figures exceed maximum and minimum recommended loads !
    
    Step    Fill. Charge   Vel.  Energy   Pmax   Pmuz  Prop.Burnt B_Time
     %       %    Grains   fps   ft.lbs    psi    psi      %        ms
    
    -11.2   82    39.94   2517    2110   35690   6732     95.6    1.347
    -10.1   83    40.45   2547    2161   36963   6817     96.0    1.328
    -09.0   84    40.96   2578    2213   38281   6899     96.5    1.308
    -07.9   85    41.46   2608    2266   39650   6978     96.9    1.287
    -06.7   86    41.97   2638    2318   41069   7054     97.3    1.267
    -05.6   87    42.47   2668    2372   42541   7128     97.7    1.247
    -04.5   88    42.98   2699    2425   44069   7198     98.0    1.227
    -03.4   89    43.48   2729    2480   45653   7265     98.3    1.208
    -02.2   90    43.99   2758    2534   47299   7328     98.6    1.190
    -01.1   91    44.49   2788    2590   49008   7388     98.9    1.171
    +00.0   92    45.00   2818    2645   50783   7445     99.1    1.153
    +01.1   93    45.51   2848    2701   52628   7497     99.3    1.136  ! Near Maximum !
    +02.2   94    46.01   2877    2757   54543   7547     99.5    1.118  ! Near Maximum !
    +03.4   95    46.52   2907    2814   56535   7592     99.6    1.102  ! Near Maximum !
    +04.5   96    47.02   2936    2871   58607   7634     99.8    1.085  ! Near Maximum !
    +05.6   97    47.53   2965    2928   60762   7671     99.9    1.069  !DANGEROUS LOAD-DO NOT USE!
    
    Results caused by ± 10% powder lot-to-lot burning rate variation using nominal charge
    Data for burning rate increased by 10% relative to nominal value:
    +Ba     92    45.00   2939    2878   61395   7166    100.0    1.072  !DANGEROUS LOAD-DO NOT USE!
    Data for burning rate decreased by 10% relative to nominal value:
    -Ba     92    45.00   2647    2334   41213   7334     93.8    1.260
    
     
  7. karnaaj

    karnaaj Member

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    H 335 works well for both and it has the distinct advantage of metering far better than Varget.
     
  8. BsChoy

    BsChoy Member

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    H335 and W748 are the same aren't they?? Or is that 746?
     
  9. GooseGestapo

    GooseGestapo Member

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    Win748 was the "original" "ball" powder propellent and was developed for the .308(7.62x51mm).
    Hence it is well adapted to the cartridge. Best results will come with 147-150gr bullets as was intended.

    Win748 is actually near identical to BL-C2. Difference between the two has more to do with variations between lot#s.

    My best accuracy with the .308 has been with IMR4064, Varget and RL-15. However, best velocities have been with BL-C2 (or 748).

    For the 165-168gr bullets, IMR4064 has been the "winner".
     
  10. Lone_Gunman

    Lone_Gunman Member

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    I thought 748 was developed for .223?
     
  11. waffentomas

    waffentomas Member

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    I use 748 exlusively in my .308, after messing around with Varget, 760, H4350, RL 15 and a couple of others. Nothing wrong with any of them, but my rifle seems to like 748 and 180gr bullets.

    I shot this group with 43 gr of 748 and a Hornady 180gr Interlock SP. After one shot to try and get to the bull, three shots went into one hole at 100 yards, and measures .229" from center to center.

    [​IMG]


    It's my all .308 powder and I have been thrilled with it. I'm not sure why people are saying it's a 165gr and up powder...it may be better for that, it's just my Weatherby Vanguard and 180gr bullets seem to do well with it.

    I use the Barnes 180gr XLC and 44gr of 748 as my elk hunting load. When I run out of XLC I'll use up my 180gr Fail Safes. This load took down two elk this year.


    Tom
     
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