I am new here on a suggestion from a friend from the S&W collectors forum. I have a custom rifle in 8x57js and it is nice enough for me to consider handloading for it. I load for 300h&h and 6.5x55 as well as a few others already. I want to use 200gr accubonds and 4064 with winchester mag primers (thats all I have available). I have mostly Norma virgin brass and some once fired hornady. My barrel is a Schneider 23.5” 1-10. Any assistance would be great thank you.
Last edited by ISAF2009; 02/24/24. Reason: Poor quality image
The 8x57 has gone through a couple of bore diameters as well as a few aliases. The original bore diameter for the 8x57—prior to 1905—was .318”, and it came to be known as the “J” bore. Funny enough, that “J” bore is a misnomer; the name is derived from U.S Army intelligence at the end of World War I, and an ornate letter “I”—for Infanterie—was mistaken for a “J”, but the name stuck, even throughout Europe. In 1905, the German Army adopted the “S” bore, this time indicating the lighter spitzer bullet used in the revised loading. The new bore diameter was, and still is .323”, and became the standard diameter for all 8mm cartridges to this day.
The 8x57 is also known as the 7.92x57mm J, 7.92x57mm JS, the 8x57mm Mauser or plainly as the 8mm Mauser; they are all describing the same cartridge.
If the above is correct, I'll use 8mm data
Code
Cartridge : 8 x 57 IS (8 mm Mauser CIP)
Bullet : .323, 200, Nosler AccuBond 54374
Useable Case Capaci: 54.862 grain H2O = 3.562 cm³
Cartridge O.A.L. L6: 3.228 inch = 81.99 mm
Barrel Length : 23.0 inch = 584.2 mm
Powder : IMR 4064
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 79 37.83 2079 1920 30246 6275 92.4 1.557
-18.0 81 38.78 2127 2008 32104 6456 93.3 1.519
-16.0 83 39.72 2174 2099 34072 6631 94.3 1.482
-14.0 85 40.67 2221 2191 36154 6801 95.1 1.446
-12.0 87 41.62 2268 2285 38361 6964 95.9 1.407
-10.0 89 42.56 2315 2380 40696 7120 96.6 1.370
-08.0 91 43.51 2362 2477 43168 7269 97.2 1.333
-06.0 93 44.45 2408 2576 45786 7410 97.8 1.297
-04.0 95 45.40 2455 2676 48559 7542 98.3 1.263 ! Near Maximum !
-02.0 97 46.34 2501 2777 51499 7666 98.8 1.230 ! Near Maximum !
+00.0 99 47.29 2547 2880 54616 7780 99.2 1.198 ! Near Maximum !
+02.0 101 48.24 2592 2984 57923 7884 99.5 1.167 !DANGEROUS LOAD-DO NOT USE!
+04.0 103 49.18 2638 3089 61434 7979 99.7 1.138 !DANGEROUS LOAD-DO NOT USE!
+06.0 105 50.13 2683 3196 65165 8063 99.9 1.109 !DANGEROUS LOAD-DO NOT USE!
+08.0 107 51.07 2727 3303 69131 8136 100.0 1.082 !DANGEROUS LOAD-DO NOT USE!
+10.0 109 52.02 2772 3411 73353 8198 100.0 1.055 !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 99 47.29 2643 3102 64104 7532 100.0 1.122 !DANGEROUS LOAD-DO NOT USE!
Data for burning rate decreased by 10% relative to nominal value:
-Ba 99 47.29 2412 2584 45348 7689 94.6 1.298
I wouldn't worry too much about the magnum primers. As with any load workup, you start low and go up a little at a time. The 8mm Mauser and IMR 4064 really don't need a magnum primer, you may be pleased with your results, you don't know until you try it. IMO
I have never seen where in predictive software you can pick your primer. So yes if standard start low and work up standard or magnum primer doesnt come into play at all.
![[Linked Image]](https://www.24hourcampfire.com/ubbthreads/ubbthreads.php/ubb/download/Number/248864/filename/2637A371-6016-4E4B-A639-9E7E5CD14444.jpeg)
![[Linked Image from i.postimg.cc]](https://i.postimg.cc/qM20VwbV/8x57-JS-01.jpg)
![[Linked Image from i.postimg.cc]](https://i.postimg.cc/nLRD2ft8/8x57.jpg)
![[Linked Image from i.postimg.cc]](https://i.postimg.cc/BbMTrLr6/8x57JR.jpg)
![[Linked Image from i.postimg.cc]](https://i.postimg.cc/8c1dXBn9/8x57JS.jpg)
![[Linked Image from i.postimg.cc]](https://i.postimg.cc/bNVMbsZp/IMG-0059.png)