Quote:
Originally Posted by SDJim
30" Barrel, 1:12" twist, Bolt Gun, VARGET
SMK 155 (2156) becuase I'm curious to see if there is that much diffrence between the 2156 and the 2155, and the Berger 155.5
|
Code:
Cartridge : .308 Win.
Bullet : .308, 155, Sierra HPBT Palma MK 2155
Cartridge O.A.L. L6: 2.825 inch or 71.76 mm
Barrel Length : 30.0 inch or 762.0 mm
Powder : Hodgdon VARGET
Predicted data by increasing and decreasing the given charge,
incremented in steps of 0.426% 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
-04.3 99 45.00 2843 2782 49956 5749 98.1 1.364
-03.8 100 45.20 2855 2805 50622 5768 98.2 1.357
-03.4 100 45.40 2866 2827 51296 5788 98.3 1.349 ! Near Maximum !
-03.0 101 45.60 2877 2849 51980 5807 98.4 1.342 ! Near Maximum !
-02.6 101 45.80 2889 2872 52674 5825 98.5 1.334 ! Near Maximum !
-02.1 101 46.00 2900 2894 53377 5844 98.6 1.327 ! Near Maximum !
-01.7 102 46.20 2911 2917 54090 5862 98.7 1.320 ! Near Maximum !
-01.3 102 46.40 2922 2939 54812 5879 98.8 1.312 ! Near Maximum !
-00.9 103 46.60 2934 2962 55546 5897 98.9 1.305 ! Near Maximum !
-00.4 103 46.80 2945 2985 56289 5913 99.0 1.298 ! Near Maximum !
+00.0 104 47.00 2956 3008 57043 5930 99.1 1.291 ! Near Maximum !
+00.4 104 47.20 2967 3031 57807 5946 99.1 1.284 ! Near Maximum !
+00.9 105 47.40 2979 3054 58583 5962 99.2 1.277 ! Near Maximum !
+01.3 105 47.60 2990 3076 59369 5977 99.3 1.270 ! Near Maximum !
+01.7 105 47.80 3001 3100 60167 5992 99.4 1.263 !DANGEROUS LOAD-DO NOT USE!
+02.1 106 48.00 3012 3123 60976 6007 99.4 1.256 !DANGEROUS LOAD-DO NOT USE!
Results caused by ± 3% powder lot-to-lot burning rate variation using nominal charge
Data for burning rate increased by 3% relative to nominal value:
+Ba 104 47.00 2994 3085 60034 5895 99.7 1.265 !DANGEROUS LOAD-DO NOT USE!
Data for burning rate decreased by 3% relative to nominal value:
-Ba 104 47.00 2915 2924 54081 5940 98.1 1.319 ! Near Maximum !
Code:
Cartridge : .308 Win.
Bullet : .308, 155, Sierra HPBT Palma MK 2156
Cartridge O.A.L. L6: 2.825 inch or 71.76 mm
Barrel Length : 30.0 inch or 762.0 mm
Powder : Hodgdon VARGET
Predicted data by increasing and decreasing the given charge,
incremented in steps of 0.426% 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
-04.3 102 45.00 2878 2851 53286 5693 98.4 1.331 ! Near Maximum !
-03.8 103 45.20 2890 2874 54020 5712 98.5 1.324 ! Near Maximum !
-03.4 103 45.40 2901 2897 54766 5730 98.6 1.316 ! Near Maximum !
-03.0 104 45.60 2913 2920 55522 5747 98.7 1.309 ! Near Maximum !
-02.6 104 45.80 2924 2943 56289 5765 98.8 1.301 ! Near Maximum !
-02.1 105 46.00 2936 2966 57068 5781 98.9 1.294 ! Near Maximum !
-01.7 105 46.20 2947 2989 57858 5798 99.0 1.287 ! Near Maximum !
-01.3 106 46.40 2959 3013 58660 5814 99.0 1.279 ! Near Maximum !
-00.9 106 46.60 2970 3036 59474 5830 99.1 1.272 !DANGEROUS LOAD-DO NOT USE!
-00.4 107 46.80 2982 3060 60299 5845 99.2 1.265 !DANGEROUS LOAD-DO NOT USE!
+00.0 107 47.00 2993 3083 61138 5860 99.3 1.258 !DANGEROUS LOAD-DO NOT USE!
+00.4 107 47.20 3004 3107 61989 5875 99.3 1.251 !DANGEROUS LOAD-DO NOT USE!
+00.9 108 47.40 3016 3130 62852 5889 99.4 1.244 !DANGEROUS LOAD-DO NOT USE!
+01.3 108 47.60 3027 3154 63729 5903 99.5 1.237 !DANGEROUS LOAD-DO NOT USE!
+01.7 109 47.80 3039 3178 64619 5916 99.5 1.230 !DANGEROUS LOAD-DO NOT USE!
+02.1 109 48.00 3050 3202 65523 5929 99.6 1.223 !DANGEROUS LOAD-DO NOT USE!
Results caused by ± 3% powder lot-to-lot burning rate variation using nominal charge
Data for burning rate increased by 3% relative to nominal value:
+Ba 107 47.00 3030 3160 64371 5817 99.8 1.233 !DANGEROUS LOAD-DO NOT USE!
Data for burning rate decreased by 3% relative to nominal value:
-Ba 107 47.00 2952 2999 57936 5879 98.4 1.285 ! Near Maximum !
Code:
Cartridge : .308 Win.
Bullet : .308, 155.5, Berger M T BT
Cartridge O.A.L. L6: 2.825 inch or 71.76 mm
Barrel Length : 30.0 inch or 762.0 mm
Powder : Hodgdon VARGET
Predicted data by increasing and decreasing the given charge,
incremented in steps of 0.426% 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
-04.3 104 45.00 2896 2896 55509 5661 98.6 1.313 ! Near Maximum !
-03.8 105 45.20 2908 2920 56291 5678 98.7 1.305 ! Near Maximum !
-03.4 105 45.40 2920 2943 57084 5695 98.8 1.298 ! Near Maximum !
-03.0 106 45.60 2931 2967 57889 5712 98.9 1.290 ! Near Maximum !
-02.6 106 45.80 2943 2990 58706 5728 99.0 1.283 ! Near Maximum !
-02.1 107 46.00 2954 3014 59536 5744 99.0 1.276 !DANGEROUS LOAD-DO NOT USE!
-01.7 107 46.20 2966 3037 60378 5759 99.1 1.268 !DANGEROUS LOAD-DO NOT USE!
-01.3 108 46.40 2978 3061 61234 5774 99.2 1.261 !DANGEROUS LOAD-DO NOT USE!
-00.9 108 46.60 2989 3085 62102 5789 99.3 1.254 !DANGEROUS LOAD-DO NOT USE!
-00.4 108 46.80 3001 3109 62984 5804 99.3 1.247 !DANGEROUS LOAD-DO NOT USE!
+00.0 109 47.00 3012 3133 63880 5817 99.4 1.240 !DANGEROUS LOAD-DO NOT USE!
+00.4 109 47.20 3024 3157 64789 5831 99.5 1.233 !DANGEROUS LOAD-DO NOT USE!
+00.9 110 47.40 3035 3181 65713 5844 99.5 1.226 !DANGEROUS LOAD-DO NOT USE!
+01.3 110 47.60 3047 3205 66651 5857 99.6 1.219 !DANGEROUS LOAD-DO NOT USE!
+01.7 111 47.80 3058 3229 67604 5869 99.6 1.212 !DANGEROUS LOAD-DO NOT USE!
+02.1 111 48.00 3070 3254 68572 5881 99.7 1.205 !DANGEROUS LOAD-DO NOT USE!
Results caused by ± 3% powder lot-to-lot burning rate variation using nominal charge
Data for burning rate increased by 3% relative to nominal value:
+Ba 109 47.00 3049 3209 67272 5768 99.9 1.216 !DANGEROUS LOAD-DO NOT USE!
Data for burning rate decreased by 3% relative to nominal value:
-Ba 109 47.00 2972 3049 60521 5842 98.6 1.266 !DANGEROUS LOAD-DO NOT USE!