Cartridge : .243 Win.
Bullet : .243, 85, Sierra HPBT 1530
Useable Case Capaci: 51.096 grain H2O = 3.318 cm³
Cartridge O.A.L. L6: 2.710 inch = 68.83 mm
Barrel Length : 22.0 inch = 558.8 mm
Powder : IMR 4831
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 41.13 2862 1546 42948 10939 97.6 1.231
-09.0 92 41.59 2893 1579 44373 11043 97.9 1.212
-08.0 93 42.04 2923 1613 45844 11143 98.3 1.193
-07.0 94 42.50 2954 1647 47362 11237 98.6 1.176
-06.0 95 42.96 2985 1681 48928 11326 98.9 1.158
-05.0 96 43.42 3015 1716 50544 11410 99.1 1.141
-04.0 97 43.87 3045 1751 52212 11489 99.3 1.124 ! Near Maximum !
-03.0 98 44.33 3076 1785 53934 11562 99.5 1.107 ! Near Maximum !
-02.0 99 44.79 3106 1820 55711 11630 99.7 1.091 ! Near Maximum !
-01.0 100 45.24 3136 1856 57545 11692 99.8 1.075 ! Near Maximum !
+00.0 101 45.70 3165 1891 59439 11748 99.9 1.059 ! Near Maximum !
+01.0 102 46.16 3195 1927 61395 11798 100.0 1.044 !DANGEROUS LOAD-DO NOT USE!
+02.0 103 46.61 3224 1962 63415 11842 100.0 1.029 !DANGEROUS LOAD-DO NOT USE!
+03.0 104 47.07 3254 1998 65501 11880 100.0 1.014 !DANGEROUS LOAD-DO NOT USE!
+04.0 105 47.53 3283 2034 67656 11916 100.0 0.999 !DANGEROUS LOAD-DO NOT USE!
+05.0 106 47.99 3312 2070 69883 11952 100.0 0.985 !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 45.70 3294 2048 70963 11320 100.0 0.980 !DANGEROUS LOAD-DO NOT USE!
Data for burning rate decreased by 10% relative to nominal value:
-Ba 101 45.70 2978 1674 48072 11735 96.2 1.165
