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Old 02-24-2010, 5:57 PM
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Quote:
Originally Posted by SDJim View Post
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!
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