Modern 8x57 QuickLoad?


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RPRNY
November 14, 2012, 09:02 PM
I realize that this request is right up there with bumming a cigarette given today's prices (piss off and buy a pack!) but I don't smoke, so please would someone indulge me on this?

If you possess QuickLoad and have a moment, please could you give me a chamber pressure check on the following. I am having to estimate a little bit because Hodgdon's load data follows SAAMI's low pressure rating for 8x57.

I am looking at:

Sellier & Bellot Brass
Win Large Rifle Primer
Varget 47.0 gr
Barnes TSX BT 200 gr

Hodgdon doesn't publish for the Barnes TSX in 200 gr and Barnes doesn't publish for Varget at 200 grs. This is under Hodgdon's Max Load for the Barnes TSX in 180 grs and the mid-point for Barnes' published data for Varget with the 160 gr TSX, so seems like a good starting point. I have a 20" barrel Persian Mauser so would prefer the somewhat faster burning Varget.

I am shooting for Chamber Pressure under 54,000 psi. and velocity in the 2450 fps range. If I'm close to 54,000 psi, I will back it down for a starting load. Thanks very much.

Again my apologies for bumming QuickLoad....

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steve4102
November 14, 2012, 11:33 PM
Cartridge : 8 x 57 IS (8 mm Mauser CIP)
Bullet : .323, 200, Barnes 'TSX' BT 32320
Cartridge O.A.L. L6: 3.228 inch or 81.99 mm
Barrel Length : 20.0 inch or 508.0 mm
Powder : Hodgdon VARGET

Predicted data by increasing and decreasing the given charge,
incremented in steps of 2.0% 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

-20.0 76 38.00 1984 1748 29622 7258 90.0 1.422
-18.0 78 38.95 2029 1829 31379 7487 91.1 1.390
-16.0 80 39.90 2075 1911 33235 7711 92.1 1.358
-14.0 82 40.85 2120 1996 35181 7931 93.0 1.327
-12.0 84 41.80 2165 2082 37219 8145 93.9 1.297
-10.0 86 42.75 2211 2171 39362 8353 94.7 1.268
-08.0 88 43.70 2256 2261 41628 8554 95.5 1.239
-06.0 90 44.65 2302 2352 44024 8749 96.2 1.211
-04.0 92 45.60 2347 2446 46558 8936 96.9 1.181
-02.0 94 46.55 2392 2541 49239 9114 97.5 1.150 ! Near Maximum !
+00.0 96 47.50 2437 2637 52076 9284 98.0 1.121 ! Near Maximum !
+02.0 97 48.45 2482 2735 55080 9444 98.5 1.092 ! Near Maximum !
+04.0 99 49.40 2527 2835 58262 9594 98.9 1.064 !DANGEROUS LOAD-DO NOT USE!
+06.0 101 50.35 2571 2936 61634 9734 99.2 1.038 !DANGEROUS LOAD-DO NOT USE!
+08.0 103 51.30 2616 3039 65211 9863 99.5 1.012 !DANGEROUS LOAD-DO NOT USE!
+10.0 105 52.25 2660 3142 69008 9980 99.7 0.987 !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 96 47.50 2539 2864 60699 9176 100.0 1.048 !DANGEROUS LOAD-DO NOT USE!
Data for burning rate decreased by 10% relative to nominal value:
-Ba 96 47.50 2301 2352 43603 8987 92.4 1.212

RPRNY
November 15, 2012, 08:18 AM
Thanks VERY much! I'll back off the starting load a bit. I'm really pleased to see such a high predicted burn rate. I prefer no fireball...

Thanks again.

john wall
November 15, 2012, 07:58 PM
European CIP specs for the 8X57S is max of 61,400 PSI. Make sure your firearm is modern and in good condition before loading to these levels.

Military 98? Peacetime build will be okay. War years guns may not be in the shape to handle these loads.

My 1948 Husqvarna Sporter with FN commercial action will handle these loads with no issue, but it KICKS your head off.

ForneyRider
November 15, 2012, 08:10 PM
I went with 48gr Varget, 200gr Accubonds, comes out to 2550fps. Hope this helps.

RPRNY
November 15, 2012, 11:37 PM
Thanks. I have been using 196 gr S&B ammo at CIP ratings to get used to the rifle so it's fine above SAAMI ratings but I will stay below CIP max. 47 - 48 gr Varget seems like it will pan out. The Barnes TSX seats a bit deeper but the rings supposedly diminish pressure, so it's likely a wash. With a 20" barrel I won't get full velocity but Varget's relatively faster burn should work well. We shall see.

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