168 LRAB in 280 AI what powder ?
- Thread starter clambdin
- Start date
- Nov 4, 2004
- 25,622
- 9,850
I would start with RL22. Its my go to powder in the 280AI.
I am going to start my load development soon, RL22 working up to around 58.0-59.0 grs.
JD338
I am going to start my load development soon, RL22 working up to around 58.0-59.0 grs.
JD338
DrMike
Ballistician
- Nov 8, 2006
- 37,554
- 6,663
JD338 has more experience with the 280 AI than many posting here; what he says carries a lot of weight. As far as burn rates are concerned, any of the powders you list would work to propel a projectile, however.
Jim does have the 280 Ackley really singing.. Out of the ones you have on hand, I would probably look at 7828 first, as it is very similar to RL22 in burn rate..
This is what the Ackley looks like with the 168 Custom Comp. I don't have any of the ABLR data, but backing down 10% from max you should be able to come up with something that looks good in your rifle..
Cartridge : .280 Ack Imp
Bullet : .284, 168, Nosler CC HPBT 53418
Useable Case Capaci: 66.234 grain H2O = 4.300 cm³
Cartridge O.A.L. L6: 3.330 inch = 84.58 mm
Barrel Length : 24.0 inch = 609.6 mm
Powder : IMR 7828 SSC
Predicted data by increasing and decreasing the given charge,
incremented in steps of 1.0% 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
-10.0 90 56.70 2662 2644 45003 11827 96.0 1.369
-09.0 91 57.33 2694 2707 46562 11961 96.5 1.347
-08.0 92 57.96 2725 2770 48179 12089 96.9 1.325
-07.0 93 58.59 2756 2834 49855 12213 97.3 1.304
-06.0 94 59.22 2787 2898 51595 12331 97.7 1.283
-05.0 95 59.85 2819 2963 53398 12443 98.0 1.263
-04.0 96 60.48 2850 3029 55275 12550 98.4 1.243 ! Near Maximum !
-03.0 97 61.11 2881 3096 57221 12651 98.7 1.224 ! Near Maximum !
-02.0 98 61.74 2912 3163 59243 12745 98.9 1.204 ! Near Maximum !
-01.0 99 62.37 2943 3231 61345 12833 99.2 1.185 ! Near Maximum !
+00.0 100 63.00 2974 3299 63530 12915 99.4 1.167 ! Near Maximum !
+01.0 101 63.63 3005 3368 65801 12990 99.6 1.148 !DANGEROUS LOAD-DO NOT USE!
+02.0 102 64.26 3036 3438 68160 13058 99.7 1.130 !DANGEROUS LOAD-DO NOT USE!
+03.0 103 64.89 3067 3508 70615 13119 99.8 1.113 !DANGEROUS LOAD-DO NOT USE!
+04.0 104 65.52 3097 3579 73179 13172 99.9 1.095 !DANGEROUS LOAD-DO NOT USE!
+05.0 105 66.15 3128 3650 75846 13219 100.0 1.078 !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 63.00 3109 3605 77364 12421 100.0 1.078 !DANGEROUS LOAD-DO NOT USE!
Data for burning rate decreased by 10% relative to nominal value:
-Ba 100 63.00 2782 2886 51293 12703 94.1 1.282
Cartridge : .280 Ack Imp
Bullet : .284, 168, Nosler CC HPBT 53418
Useable Case Capaci: 66.234 grain H2O = 4.300 cm³
Cartridge O.A.L. L6: 3.330 inch = 84.58 mm
Barrel Length : 24.0 inch = 609.6 mm
Powder : Hodgdon H4831 SC
Predicted data by increasing and decreasing the given charge,
incremented in steps of 1.0% 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
-10.0 90 55.35 2590 2502 44870 10933 95.1 1.382
-09.0 91 55.97 2619 2559 46383 11063 95.5 1.361
-08.0 92 56.58 2648 2616 47949 11189 96.0 1.340
-07.0 93 57.20 2678 2674 49572 11312 96.4 1.319
-06.0 94 57.81 2707 2733 51249 11431 96.8 1.299
-05.0 95 58.43 2736 2793 52978 11546 97.2 1.279
-04.0 96 59.04 2765 2853 54762 11657 97.5 1.260
-03.0 97 59.66 2795 2913 56606 11764 97.8 1.241 ! Near Maximum !
-02.0 98 60.27 2824 2974 58516 11866 98.1 1.222 ! Near Maximum !
-01.0 99 60.89 2853 3036 60494 11964 98.4 1.204 ! Near Maximum !
+00.0 100 61.50 2882 3099 62543 12058 98.7 1.186 ! Near Maximum !
+01.0 101 62.12 2911 3162 64666 12146 98.9 1.168 !DANGEROUS LOAD-DO NOT USE!
+02.0 102 62.73 2941 3225 66867 12230 99.1 1.151 !DANGEROUS LOAD-DO NOT USE!
+03.0 103 63.35 2970 3290 69149 12308 99.3 1.133 !DANGEROUS LOAD-DO NOT USE!
+04.0 104 63.96 2999 3354 71517 12382 99.5 1.117 !DANGEROUS LOAD-DO NOT USE!
+05.0 105 64.58 3028 3420 73973 12450 99.6 1.100 !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 61.50 3008 3375 74323 11774 100.0 1.102 !DANGEROUS LOAD-DO NOT USE!
Data for burning rate decreased by 10% relative to nominal value:
-Ba 100 61.50 2710 2740 51092 11740 93.2 1.295
Cartridge : .280 Ack Imp
Bullet : .284, 168, Nosler CC HPBT 53418
Useable Case Capaci: 66.234 grain H2O = 4.300 cm³
Cartridge O.A.L. L6: 3.330 inch = 84.58 mm
Barrel Length : 24.0 inch = 609.6 mm
Powder : Vihtavuori N165
Predicted data by increasing and decreasing the given charge,
incremented in steps of 1.0% 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
-10.0 94 56.70 2585 2492 45509 10564 97.9 1.389
-09.0 95 57.33 2613 2547 47056 10665 98.2 1.367
-08.0 96 57.96 2642 2603 48656 10762 98.5 1.346
-07.0 97 58.59 2670 2659 50311 10854 98.8 1.325
-06.0 98 59.22 2698 2716 52025 10942 99.0 1.305
-05.0 99 59.85 2726 2773 53799 11024 99.2 1.284
-04.0 100 60.48 2754 2830 55635 11102 99.4 1.265 ! Near Maximum !
-03.0 101 61.11 2783 2888 57536 11174 99.6 1.246 ! Near Maximum !
-02.0 102 61.74 2811 2947 59505 11242 99.7 1.227 ! Near Maximum !
-01.0 103 62.37 2838 3005 61545 11303 99.8 1.208 ! Near Maximum !
+00.0 104 63.00 2866 3065 63659 11360 99.9 1.190 ! Near Maximum !
+01.0 105 63.63 2894 3124 65850 11411 100.0 1.172 !DANGEROUS LOAD-DO NOT USE!
+02.0 106 64.26 2922 3184 68122 11456 100.0 1.155 !DANGEROUS LOAD-DO NOT USE!
+03.0 107 64.89 2949 3245 70479 11496 100.0 1.137 !DANGEROUS LOAD-DO NOT USE!
+04.0 109 65.52 2977 3305 72924 11534 100.0 1.120 !DANGEROUS LOAD-DO NOT USE!
+05.0 110 66.15 3004 3366 75462 11572 100.0 1.104 !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 104 63.00 2975 3301 76002 10912 100.0 1.106 !DANGEROUS LOAD-DO NOT USE!
Data for burning rate decreased by 10% relative to nominal value:
-Ba 104 63.00 2707 2732 51536 11416 96.5 1.302
Cartridge : .280 Ack Imp
Bullet : .284, 168, Nosler CC HPBT 53418
Useable Case Capaci: 66.234 grain H2O = 4.300 cm³
Cartridge O.A.L. L6: 3.330 inch = 84.58 mm
Barrel Length : 24.0 inch = 609.6 mm
Powder : Alliant Reloder-17
Predicted data by increasing and decreasing the given charge,
incremented in steps of 1.0% 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
-10.0 78 49.95 2638 2597 46812 10355 100.0 1.351
-09.0 79 50.51 2663 2645 48229 10423 100.0 1.333
-08.0 80 51.06 2687 2694 49683 10489 100.0 1.314
-07.0 81 51.62 2711 2742 51179 10555 100.0 1.297
-06.0 81 52.17 2735 2791 52720 10621 100.0 1.280
-05.0 82 52.73 2759 2840 54303 10686 100.0 1.263
-04.0 83 53.28 2783 2889 55932 10750 100.0 1.246 ! Near Maximum !
-03.0 84 53.84 2806 2938 57600 10814 100.0 1.230 ! Near Maximum !
-02.0 85 54.39 2830 2988 59309 10877 100.0 1.214 ! Near Maximum !
-01.0 86 54.95 2853 3037 61063 10939 100.0 1.198 ! Near Maximum !
+00.0 87 55.50 2877 3087 62865 11001 100.0 1.183 ! Near Maximum !
+01.0 88 56.06 2900 3137 64718 11062 100.0 1.168 !DANGEROUS LOAD-DO NOT USE!
+02.0 88 56.61 2923 3187 66621 11123 100.0 1.153 !DANGEROUS LOAD-DO NOT USE!
+03.0 89 57.17 2946 3238 68578 11183 100.0 1.139 !DANGEROUS LOAD-DO NOT USE!
+04.0 90 57.72 2969 3288 70590 11242 100.0 1.125 !DANGEROUS LOAD-DO NOT USE!
+05.0 91 58.28 2992 3339 72658 11300 100.0 1.111 !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 87 55.50 2954 3256 73851 10691 100.0 1.110 !DANGEROUS LOAD-DO NOT USE!
Data for burning rate decreased by 10% relative to nominal value:
-Ba 87 55.50 2759 2840 51925 11435 99.9 1.280
Cartridge : .280 Ack Imp
Bullet : .284, 168, Nosler CC HPBT 53418
Useable Case Capaci: 66.234 grain H2O = 4.300 cm³
Cartridge O.A.L. L6: 3.330 inch = 84.58 mm
Barrel Length : 24.0 inch = 609.6 mm
Powder : Alliant Reloder-22
Predicted data by increasing and decreasing the given charge,
incremented in steps of 1.0% 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
-10.0 91 56.25 2643 2606 44484 11724 97.3 1.395
-09.0 92 56.88 2673 2666 46008 11849 97.6 1.373
-08.0 93 57.50 2703 2725 47576 11968 98.0 1.352
-07.0 94 58.13 2733 2786 49193 12082 98.3 1.331
-06.0 95 58.75 2762 2847 50863 12192 98.6 1.310
-05.0 96 59.38 2792 2908 52589 12296 98.9 1.290
-04.0 97 60.00 2822 2970 54375 12395 99.1 1.271
-03.0 98 60.63 2851 3032 56222 12488 99.3 1.251 ! Near Maximum !
-02.0 99 61.25 2881 3095 58133 12576 99.5 1.232 ! Near Maximum !
-01.0 100 61.88 2910 3159 60111 12657 99.6 1.213 ! Near Maximum !
+00.0 101 62.50 2939 3223 62157 12733 99.8 1.195 ! Near Maximum !
+01.0 102 63.13 2968 3287 64276 12802 99.9 1.177 !DANGEROUS LOAD-DO NOT USE!
+02.0 103 63.75 2998 3352 66469 12865 99.9 1.159 !DANGEROUS LOAD-DO NOT USE!
+03.0 104 64.38 3027 3417 68741 12922 100.0 1.142 !DANGEROUS LOAD-DO NOT USE!
+04.0 105 65.00 3055 3482 71095 12973 100.0 1.125 !DANGEROUS LOAD-DO NOT USE!
+05.0 106 65.63 3084 3548 73534 13020 100.0 1.108 !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 101 62.50 3064 3502 75084 12253 100.0 1.105 !DANGEROUS LOAD-DO NOT USE!
Data for burning rate decreased by 10% relative to nominal value:
-Ba 101 62.50 2758 2838 49621 12654 95.5 1.315
Just remember, this data was for another bullet.. Hope it helps out a little.
This is what the Ackley looks like with the 168 Custom Comp. I don't have any of the ABLR data, but backing down 10% from max you should be able to come up with something that looks good in your rifle..
Cartridge : .280 Ack Imp
Bullet : .284, 168, Nosler CC HPBT 53418
Useable Case Capaci: 66.234 grain H2O = 4.300 cm³
Cartridge O.A.L. L6: 3.330 inch = 84.58 mm
Barrel Length : 24.0 inch = 609.6 mm
Powder : IMR 7828 SSC
Predicted data by increasing and decreasing the given charge,
incremented in steps of 1.0% 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
-10.0 90 56.70 2662 2644 45003 11827 96.0 1.369
-09.0 91 57.33 2694 2707 46562 11961 96.5 1.347
-08.0 92 57.96 2725 2770 48179 12089 96.9 1.325
-07.0 93 58.59 2756 2834 49855 12213 97.3 1.304
-06.0 94 59.22 2787 2898 51595 12331 97.7 1.283
-05.0 95 59.85 2819 2963 53398 12443 98.0 1.263
-04.0 96 60.48 2850 3029 55275 12550 98.4 1.243 ! Near Maximum !
-03.0 97 61.11 2881 3096 57221 12651 98.7 1.224 ! Near Maximum !
-02.0 98 61.74 2912 3163 59243 12745 98.9 1.204 ! Near Maximum !
-01.0 99 62.37 2943 3231 61345 12833 99.2 1.185 ! Near Maximum !
+00.0 100 63.00 2974 3299 63530 12915 99.4 1.167 ! Near Maximum !
+01.0 101 63.63 3005 3368 65801 12990 99.6 1.148 !DANGEROUS LOAD-DO NOT USE!
+02.0 102 64.26 3036 3438 68160 13058 99.7 1.130 !DANGEROUS LOAD-DO NOT USE!
+03.0 103 64.89 3067 3508 70615 13119 99.8 1.113 !DANGEROUS LOAD-DO NOT USE!
+04.0 104 65.52 3097 3579 73179 13172 99.9 1.095 !DANGEROUS LOAD-DO NOT USE!
+05.0 105 66.15 3128 3650 75846 13219 100.0 1.078 !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 63.00 3109 3605 77364 12421 100.0 1.078 !DANGEROUS LOAD-DO NOT USE!
Data for burning rate decreased by 10% relative to nominal value:
-Ba 100 63.00 2782 2886 51293 12703 94.1 1.282
Cartridge : .280 Ack Imp
Bullet : .284, 168, Nosler CC HPBT 53418
Useable Case Capaci: 66.234 grain H2O = 4.300 cm³
Cartridge O.A.L. L6: 3.330 inch = 84.58 mm
Barrel Length : 24.0 inch = 609.6 mm
Powder : Hodgdon H4831 SC
Predicted data by increasing and decreasing the given charge,
incremented in steps of 1.0% 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
-10.0 90 55.35 2590 2502 44870 10933 95.1 1.382
-09.0 91 55.97 2619 2559 46383 11063 95.5 1.361
-08.0 92 56.58 2648 2616 47949 11189 96.0 1.340
-07.0 93 57.20 2678 2674 49572 11312 96.4 1.319
-06.0 94 57.81 2707 2733 51249 11431 96.8 1.299
-05.0 95 58.43 2736 2793 52978 11546 97.2 1.279
-04.0 96 59.04 2765 2853 54762 11657 97.5 1.260
-03.0 97 59.66 2795 2913 56606 11764 97.8 1.241 ! Near Maximum !
-02.0 98 60.27 2824 2974 58516 11866 98.1 1.222 ! Near Maximum !
-01.0 99 60.89 2853 3036 60494 11964 98.4 1.204 ! Near Maximum !
+00.0 100 61.50 2882 3099 62543 12058 98.7 1.186 ! Near Maximum !
+01.0 101 62.12 2911 3162 64666 12146 98.9 1.168 !DANGEROUS LOAD-DO NOT USE!
+02.0 102 62.73 2941 3225 66867 12230 99.1 1.151 !DANGEROUS LOAD-DO NOT USE!
+03.0 103 63.35 2970 3290 69149 12308 99.3 1.133 !DANGEROUS LOAD-DO NOT USE!
+04.0 104 63.96 2999 3354 71517 12382 99.5 1.117 !DANGEROUS LOAD-DO NOT USE!
+05.0 105 64.58 3028 3420 73973 12450 99.6 1.100 !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 61.50 3008 3375 74323 11774 100.0 1.102 !DANGEROUS LOAD-DO NOT USE!
Data for burning rate decreased by 10% relative to nominal value:
-Ba 100 61.50 2710 2740 51092 11740 93.2 1.295
Cartridge : .280 Ack Imp
Bullet : .284, 168, Nosler CC HPBT 53418
Useable Case Capaci: 66.234 grain H2O = 4.300 cm³
Cartridge O.A.L. L6: 3.330 inch = 84.58 mm
Barrel Length : 24.0 inch = 609.6 mm
Powder : Vihtavuori N165
Predicted data by increasing and decreasing the given charge,
incremented in steps of 1.0% 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
-10.0 94 56.70 2585 2492 45509 10564 97.9 1.389
-09.0 95 57.33 2613 2547 47056 10665 98.2 1.367
-08.0 96 57.96 2642 2603 48656 10762 98.5 1.346
-07.0 97 58.59 2670 2659 50311 10854 98.8 1.325
-06.0 98 59.22 2698 2716 52025 10942 99.0 1.305
-05.0 99 59.85 2726 2773 53799 11024 99.2 1.284
-04.0 100 60.48 2754 2830 55635 11102 99.4 1.265 ! Near Maximum !
-03.0 101 61.11 2783 2888 57536 11174 99.6 1.246 ! Near Maximum !
-02.0 102 61.74 2811 2947 59505 11242 99.7 1.227 ! Near Maximum !
-01.0 103 62.37 2838 3005 61545 11303 99.8 1.208 ! Near Maximum !
+00.0 104 63.00 2866 3065 63659 11360 99.9 1.190 ! Near Maximum !
+01.0 105 63.63 2894 3124 65850 11411 100.0 1.172 !DANGEROUS LOAD-DO NOT USE!
+02.0 106 64.26 2922 3184 68122 11456 100.0 1.155 !DANGEROUS LOAD-DO NOT USE!
+03.0 107 64.89 2949 3245 70479 11496 100.0 1.137 !DANGEROUS LOAD-DO NOT USE!
+04.0 109 65.52 2977 3305 72924 11534 100.0 1.120 !DANGEROUS LOAD-DO NOT USE!
+05.0 110 66.15 3004 3366 75462 11572 100.0 1.104 !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 104 63.00 2975 3301 76002 10912 100.0 1.106 !DANGEROUS LOAD-DO NOT USE!
Data for burning rate decreased by 10% relative to nominal value:
-Ba 104 63.00 2707 2732 51536 11416 96.5 1.302
Cartridge : .280 Ack Imp
Bullet : .284, 168, Nosler CC HPBT 53418
Useable Case Capaci: 66.234 grain H2O = 4.300 cm³
Cartridge O.A.L. L6: 3.330 inch = 84.58 mm
Barrel Length : 24.0 inch = 609.6 mm
Powder : Alliant Reloder-17
Predicted data by increasing and decreasing the given charge,
incremented in steps of 1.0% 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
-10.0 78 49.95 2638 2597 46812 10355 100.0 1.351
-09.0 79 50.51 2663 2645 48229 10423 100.0 1.333
-08.0 80 51.06 2687 2694 49683 10489 100.0 1.314
-07.0 81 51.62 2711 2742 51179 10555 100.0 1.297
-06.0 81 52.17 2735 2791 52720 10621 100.0 1.280
-05.0 82 52.73 2759 2840 54303 10686 100.0 1.263
-04.0 83 53.28 2783 2889 55932 10750 100.0 1.246 ! Near Maximum !
-03.0 84 53.84 2806 2938 57600 10814 100.0 1.230 ! Near Maximum !
-02.0 85 54.39 2830 2988 59309 10877 100.0 1.214 ! Near Maximum !
-01.0 86 54.95 2853 3037 61063 10939 100.0 1.198 ! Near Maximum !
+00.0 87 55.50 2877 3087 62865 11001 100.0 1.183 ! Near Maximum !
+01.0 88 56.06 2900 3137 64718 11062 100.0 1.168 !DANGEROUS LOAD-DO NOT USE!
+02.0 88 56.61 2923 3187 66621 11123 100.0 1.153 !DANGEROUS LOAD-DO NOT USE!
+03.0 89 57.17 2946 3238 68578 11183 100.0 1.139 !DANGEROUS LOAD-DO NOT USE!
+04.0 90 57.72 2969 3288 70590 11242 100.0 1.125 !DANGEROUS LOAD-DO NOT USE!
+05.0 91 58.28 2992 3339 72658 11300 100.0 1.111 !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 87 55.50 2954 3256 73851 10691 100.0 1.110 !DANGEROUS LOAD-DO NOT USE!
Data for burning rate decreased by 10% relative to nominal value:
-Ba 87 55.50 2759 2840 51925 11435 99.9 1.280
Cartridge : .280 Ack Imp
Bullet : .284, 168, Nosler CC HPBT 53418
Useable Case Capaci: 66.234 grain H2O = 4.300 cm³
Cartridge O.A.L. L6: 3.330 inch = 84.58 mm
Barrel Length : 24.0 inch = 609.6 mm
Powder : Alliant Reloder-22
Predicted data by increasing and decreasing the given charge,
incremented in steps of 1.0% 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
-10.0 91 56.25 2643 2606 44484 11724 97.3 1.395
-09.0 92 56.88 2673 2666 46008 11849 97.6 1.373
-08.0 93 57.50 2703 2725 47576 11968 98.0 1.352
-07.0 94 58.13 2733 2786 49193 12082 98.3 1.331
-06.0 95 58.75 2762 2847 50863 12192 98.6 1.310
-05.0 96 59.38 2792 2908 52589 12296 98.9 1.290
-04.0 97 60.00 2822 2970 54375 12395 99.1 1.271
-03.0 98 60.63 2851 3032 56222 12488 99.3 1.251 ! Near Maximum !
-02.0 99 61.25 2881 3095 58133 12576 99.5 1.232 ! Near Maximum !
-01.0 100 61.88 2910 3159 60111 12657 99.6 1.213 ! Near Maximum !
+00.0 101 62.50 2939 3223 62157 12733 99.8 1.195 ! Near Maximum !
+01.0 102 63.13 2968 3287 64276 12802 99.9 1.177 !DANGEROUS LOAD-DO NOT USE!
+02.0 103 63.75 2998 3352 66469 12865 99.9 1.159 !DANGEROUS LOAD-DO NOT USE!
+03.0 104 64.38 3027 3417 68741 12922 100.0 1.142 !DANGEROUS LOAD-DO NOT USE!
+04.0 105 65.00 3055 3482 71095 12973 100.0 1.125 !DANGEROUS LOAD-DO NOT USE!
+05.0 106 65.63 3084 3548 73534 13020 100.0 1.108 !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 101 62.50 3064 3502 75084 12253 100.0 1.105 !DANGEROUS LOAD-DO NOT USE!
Data for burning rate decreased by 10% relative to nominal value:
-Ba 101 62.50 2758 2838 49621 12654 95.5 1.315
Just remember, this data was for another bullet.. Hope it helps out a little.
I would think that you would be fine starting with 7828. I shoot it in mine and it shoots just as fine as RL-22. A buddy is shooting the 168 ABLR in his 280 AI and he is loading up 7828ssc and is getting dang near 3000 fps, and ragged hole groups.
If for some reason 7828 didn't pan out I might try the H4831, just because you have it. RL-22 works great, but why have another can of powder cluttering the shelf if a powder that you already use will do the trick.
Good luck!
If for some reason 7828 didn't pan out I might try the H4831, just because you have it. RL-22 works great, but why have another can of powder cluttering the shelf if a powder that you already use will do the trick.
Good luck!
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