Quick load request
- Thread starter trapper10
- Start date
DrMike
Ballistician
- Nov 8, 2006
- 37,159
- 5,608
Code:
Cartridge : .270 Win. (SAAMI)
Bullet : .277, 130, Nosler BalTip 27130
Useable Case Capaci: 63.843 grain H2O = 4.145 cm³
Cartridge O.A.L. L6: 3.340 inch = 84.84 mm
Barrel Length : 24.0 inch = 609.6 mm
Powder : Vihtavuori N565 *C*T
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
-10.0 101 60.93 2875 2386 43374 11983 92.1 1.300
-09.0 102 61.61 2913 2449 45092 12144 92.7 1.276
-08.0 103 62.28 2951 2513 46874 12300 93.4 1.253
-07.0 104 62.96 2989 2578 48725 12451 94.0 1.231
-06.0 105 63.64 3027 2644 50648 12597 94.6 1.209
-05.0 106 64.32 3065 2712 52655 12737 95.2 1.188
-04.0 108 64.99 3103 2780 54749 12871 95.7 1.166
-03.0 109 65.67 3141 2849 56934 12999 96.2 1.146 ! Near Maximum !
-02.0 110 66.35 3180 2919 59216 13121 96.7 1.125 ! Near Maximum !
-01.0 111 67.02 3218 2989 61600 13235 97.1 1.105 ! Near Maximum !
+00.0 112 67.70 3257 3061 64092 13343 97.6 1.085 ! Near Maximum !
+01.0 113 68.38 3295 3134 66697 13443 97.9 1.066 !DANGEROUS LOAD-DO NOT USE!
+02.0 114 69.05 3334 3208 69423 13536 98.3 1.047 !DANGEROUS LOAD-DO NOT USE!
+03.0 115 69.73 3372 3282 72276 13621 98.6 1.028 !DANGEROUS LOAD-DO NOT USE!
+04.0 116 70.41 3411 3358 75265 13697 98.9 1.010 !DANGEROUS LOAD-DO NOT USE!
+05.0 118 71.09 3449 3434 78397 13765 99.2 0.992 !DANGEROUS LOAD-DO NOT USE!
Results caused by ± 5% powder lot-to-lot burning rate variation using nominal charge
Data for burning rate increased by 5% relative to nominal value:
+Ba 112 67.70 3357 3253 71794 13316 99.4 1.035 !DANGEROUS LOAD-DO NOT USE!
Data for burning rate decreased by 5% relative to nominal value:
-Ba 112 67.70 3140 2845 56600 13157 94.4 1.144 ! Near Maximum !DrMike
Ballistician
- Nov 8, 2006
- 37,159
- 5,608
Code:
Cartridge : .270 Win. (SAAMI)
Bullet : .277, 130, Nosler BalTip 27130
Useable Case Capaci: 63.843 grain H2O = 4.145 cm³
Cartridge O.A.L. L6: 3.340 inch = 84.84 mm
Barrel Length : 24.0 inch = 609.6 mm
Powder : Vihtavuori N560 *C
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 96 57.96 2918 2457 44778 12106 92.1 1.260
-09.0 97 58.60 2954 2519 46393 12268 92.8 1.239
-08.0 99 59.25 2990 2581 48069 12426 93.4 1.218
-07.0 100 59.89 3026 2644 49813 12580 94.0 1.198
-06.0 101 60.54 3063 2707 51625 12728 94.5 1.179
-05.0 102 61.18 3099 2772 53511 12872 95.1 1.159
-04.0 103 61.82 3135 2838 55473 13010 95.6 1.140 ! Near Maximum !
-03.0 104 62.47 3172 2904 57509 13143 96.1 1.122 ! Near Maximum !
-02.0 105 63.11 3208 2971 59640 13271 96.5 1.103 ! Near Maximum !
-01.0 106 63.76 3245 3039 61857 13392 97.0 1.085 ! Near Maximum !
+00.0 107 64.40 3281 3108 64164 13507 97.4 1.067 ! Near Maximum !
+01.0 108 65.04 3318 3178 66571 13616 97.7 1.050 !DANGEROUS LOAD-DO NOT USE!
+02.0 109 65.69 3354 3248 69080 13719 98.1 1.033 !DANGEROUS LOAD-DO NOT USE!
+03.0 110 66.33 3391 3319 71697 13814 98.4 1.016 !DANGEROUS LOAD-DO NOT USE!
+04.0 111 66.98 3427 3391 74430 13903 98.7 0.999 !DANGEROUS LOAD-DO NOT USE!
+05.0 112 67.62 3464 3464 77279 13985 99.0 0.983 !DANGEROUS LOAD-DO NOT USE!
Results caused by ± 5% powder lot-to-lot burning rate variation using nominal charge
Data for burning rate increased by 5% relative to nominal value:
+Ba 107 64.40 3377 3292 71307 13514 99.2 1.021 !DANGEROUS LOAD-DO NOT USE!
Data for burning rate decreased by 5% relative to nominal value:
-Ba 107 64.40 3171 2903 57495 13301 94.3 1.119 ! Near Maximum !
