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Joined: Oct 2004
Posts: 759
Campfire Regular
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OP
Campfire Regular
Joined: Oct 2004
Posts: 759 |
I've been loading RL26 for my 280 AI for several years, but my 26 supply is dwindling and it's not looking like it's going to become readily available, again, anytime soon. So, I'm going to start working toward a replacement. I've got some VV N170 and I'm starting there, for similar burn rate, but I've not found any 280 AI data for it. Extrapolating from other cartridges, they seem pretty close for charge, but I'd rather be a little more sure on the pressures for a starting point to work up from. Can someone run QL with a 150 Partition and/or a 150 ELD-X?
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Joined: May 2005
Posts: 1,813
Campfire Regular
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Campfire Regular
Joined: May 2005
Posts: 1,813 |
Cartridge : .280 Ack Imp
Bullet : .284, 150, Hornady ELD-X 2826
Useable Case Capaci: 65.122 grain H2O = 4.228 cm³
Cartridge O.A.L. L6: 3.330 inch = 84.58 mm
Barrel Length : 24.0 inch = 609.6 mm
Powder : Vihtavuori N170 *C
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 80 47.50 1945 1261 19492 6900 68.4 1.879
-18.0 82 48.69 1997 1328 20705 7196 69.9 1.837
-16.0 84 49.88 2049 1399 22002 7496 71.4 1.795
-14.0 86 51.07 2103 1472 23385 7797 72.9 1.753
-12.0 88 52.25 2156 1549 24873 8100 74.4 1.713
-10.0 90 53.44 2211 1628 26463 8404 75.9 1.673
-08.0 92 54.63 2266 1710 28167 8708 77.4 1.633
-06.0 94 55.82 2322 1796 29993 9011 78.8 1.595
-04.0 96 57.00 2378 1884 31952 9312 80.2 1.557
-02.0 98 58.19 2435 1975 34035 9611 81.6 1.519
+00.0 100 59.38 2493 2070 36248 9907 83.0 1.483
+02.0 102 60.57 2551 2168 38607 10198 84.3 1.441
+04.0 104 61.76 2610 2269 41139 10484 85.6 1.397
+06.0 106 62.94 2669 2373 43857 10764 86.9 1.355
+08.0 108 64.13 2729 2481 46778 11037 88.1 1.314
+10.0 110 65.32 2790 2592 49921 11302 89.3 1.275
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:
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Joined: May 2005
Posts: 1,813
Campfire Regular
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Campfire Regular
Joined: May 2005
Posts: 1,813 |
Cartridge : .280 Ack Imp
Bullet : .284, 150, Nosler PART SP 16326
Useable Case Capaci: 67.124 grain H2O = 4.358 cm³
Cartridge O.A.L. L6: 3.330 inch = 84.58 mm
Barrel Length : 24.0 inch = 609.6 mm
Powder : Vihtavuori N170 *C
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 80 48.96 1977 1302 20139 7246 69.5 1.855
-18.0 82 50.18 2030 1372 21408 7555 71.0 1.812
-16.0 84 51.41 2083 1446 22766 7867 72.5 1.771
-14.0 86 52.63 2137 1522 24218 8181 74.1 1.730
-12.0 88 53.86 2192 1600 25774 8496 75.6 1.690
-10.0 90 55.08 2248 1682 27440 8811 77.0 1.650
-08.0 92 56.30 2304 1767 29227 9126 78.5 1.611
-06.0 94 57.53 2360 1856 31133 9440 80.0 1.573
-04.0 96 58.75 2418 1947 33153 9751 81.4 1.535
-02.0 98 59.98 2476 2041 35297 10059 82.8 1.498
+00.0 100 61.20 2534 2139 37589 10363 84.1 1.459
+02.0 102 62.42 2593 2240 40046 10663 85.4 1.415
+04.0 104 63.65 2653 2344 42681 10956 86.7 1.373
+06.0 106 64.87 2713 2451 45510 11242 88.0 1.331
+08.0 108 66.10 2774 2562 48549 11521 89.2 1.291
+10.0 110 67.32 2835 2676 51818 11790 90.3 1.252
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 100 61.20 2718 2460 45606 11120 92.1 1.334
Data for burning rate decreased by 10% relative to nominal value:
-Ba 100 61.20 2322 1796 30033 9226 73.7 1.585
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Joined: May 2005
Posts: 1,813
Campfire Regular
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Campfire Regular
Joined: May 2005
Posts: 1,813 |
Compared to R 26. Cartridge : .280 Ack Imp
Bullet : .284, 150, Nosler PART SP 16326
Useable Case Capaci: 67.124 grain H2O = 4.358 cm³
Cartridge O.A.L. L6: 3.330 inch = 84.58 mm
Barrel Length : 24.0 inch = 609.6 mm
Powder : Alliant Reloder-26 *C
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 80 53.21 2450 1999 29004 10870 93.8 1.587
-18.0 82 54.54 2518 2112 31122 11212 95.1 1.545
-16.0 84 55.87 2586 2228 33408 11530 96.3 1.504
-14.0 86 57.20 2654 2347 35879 11822 97.4 1.464
-12.0 88 58.53 2723 2469 38552 12086 98.3 1.418
-10.0 90 59.86 2791 2594 41446 12318 99.0 1.370
-08.0 92 61.19 2858 2721 44584 12518 99.5 1.324
-06.0 94 62.52 2925 2850 47988 12682 99.8 1.279
-04.0 96 63.85 2992 2982 51687 12810 100.0 1.237
-02.0 98 65.18 3058 3115 55712 12906 100.0 1.195 ! Near Maximum !
+00.0 100 66.51 3124 3250 60095 12996 100.0 1.155 ! Near Maximum !
+02.0 102 67.84 3188 3386 64864 13081 100.0 1.117 !DANGEROUS LOAD-DO NOT USE!
+04.0 104 69.17 3253 3524 70017 13160 100.0 1.080 !DANGEROUS LOAD-DO NOT USE!
+06.0 106 70.50 3317 3664 75611 13235 100.0 1.044 !DANGEROUS LOAD-DO NOT USE!
+08.0 108 71.83 3380 3806 81696 13303 100.0 1.010 !DANGEROUS LOAD-DO NOT USE!
+10.0 110 73.16 3444 3950 88327 13366 100.0 0.977 !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 100 66.51 3263 3547 75841 12437 100.0 1.055 !DANGEROUS LOAD-DO NOT USE!
Data for burning rate decreased by 10% relative to nominal value:
-Ba 100 66.51 2907 2816 46360 13351 97.6 1.289
Cartridge : .280 Ack Imp
Bullet : .284, 150, Hornady ECX 28214
Useable Case Capaci: 65.233 grain H2O = 4.236 cm³
Cartridge O.A.L. L6: 3.330 inch = 84.58 mm
Barrel Length : 24.0 inch = 609.6 mm
Powder : Alliant Reloder-26 *C
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 80 51.72 2411 1937 28005 10464 92.8 1.606
-18.0 82 53.01 2479 2046 30027 10808 94.2 1.564
-16.0 84 54.31 2546 2159 32209 11130 95.5 1.523
-14.0 86 55.60 2614 2276 34565 11429 96.7 1.482
-12.0 88 56.89 2682 2395 37112 11701 97.7 1.442
-10.0 90 58.19 2749 2518 39869 11945 98.5 1.393
-08.0 92 59.48 2817 2643 42856 12157 99.1 1.346
-06.0 94 60.77 2884 2770 46094 12337 99.6 1.301
-04.0 96 62.06 2951 2900 49609 12483 99.9 1.258
-02.0 98 63.36 3017 3032 53433 12592 100.0 1.216
+00.0 100 64.65 3083 3165 57595 12677 100.0 1.175 ! Near Maximum !
+02.0 102 65.94 3147 3300 62136 12757 100.0 1.136 ! Near Maximum !
+04.0 104 67.24 3212 3436 67096 12833 100.0 1.098 !DANGEROUS LOAD-DO NOT USE!
+06.0 106 68.53 3276 3574 72479 12903 100.0 1.062 !DANGEROUS LOAD-DO NOT USE!
+08.0 108 69.82 3339 3714 78331 12967 100.0 1.027 !DANGEROUS LOAD-DO NOT USE!
+10.0 110 71.12 3403 3857 84710 13026 100.0 0.993 !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 100 64.65 3227 3468 72978 12109 100.0 1.072 !DANGEROUS LOAD-DO NOT USE!
Data for burning rate decreased by 10% relative to nominal value:
-Ba 100 64.65 2861 2726 44609 12913 96.8 1.311
Last edited by MickinColo; 12/18/23.
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Joined: Oct 2004
Posts: 759
Campfire Regular
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OP
Campfire Regular
Joined: Oct 2004
Posts: 759 |
Much appreciated, Mick!  I knew the energy for weight comparison wouldn’t be favorable, but damn! That’s an even more substantial difference than I’d anticipated. I’ll load a few, anyway, see how close the predicted velo is to my rifle.
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Joined: May 2005
Posts: 1,813
Campfire Regular
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Campfire Regular
Joined: May 2005
Posts: 1,813 |
Let me know, I'll be interested in your results.
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Joined: Oct 2004
Posts: 759
Campfire Regular
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OP
Campfire Regular
Joined: Oct 2004
Posts: 759 |
Let me know, I'll be interested in your results. Will do, no problem. Thanks again.
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