Win 748 for 308 Winchester?


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Lone_Gunman
November 12, 2007, 09:50 AM
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?

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Grumulkin
November 12, 2007, 10:46 AM
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.

GunTech
November 12, 2007, 10:48 AM
What bullet? There are a number of loads for 308 and W748 that work fine, and it meters really well.

Bad Flynch
November 12, 2007, 12:04 PM
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.

Lone_Gunman
November 12, 2007, 01:45 PM
I will be loading Hornday 150g SST bullets for hunting whitetail deer. How would 748 work for that?

GunTech
November 12, 2007, 02:36 PM
Assuming commercial 308 brass:


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

karnaaj
November 12, 2007, 04:10 PM
H 335 works well for both and it has the distinct advantage of metering far better than Varget.

BsChoy
November 12, 2007, 04:40 PM
H335 and W748 are the same aren't they?? Or is that 746?

GooseGestapo
November 13, 2007, 05:11 AM
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".

Lone_Gunman
November 13, 2007, 01:58 PM
I thought 748 was developed for .223?

waffentomas
November 13, 2007, 10:01 PM
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]http://img266.imageshack.us/img266/285/img2191lh5.jpg


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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