George Foster
Beginner
- Dec 4, 2005
- 230
- 90
243 Win
75 Sierra HP
Rem Case
2.685 COL
22" Barrel
RL 19 Powder
75 Sierra HP
Rem Case
2.685 COL
22" Barrel
RL 19 Powder
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Cartridge : .243 Win.
Bullet : .243, 75, Sierra HP 1510
Useable Case Capaci: 51.958 grain H2O = 3.374 cm³
Cartridge O.A.L. L6: 2.685 inch = 68.20 mm
Barrel Length : 22.0 inch = 558.8 mm
Powder : Alliant Reloder-19 *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 93 44.55 2988 1487 42210 11085 90.4 1.162
-09.0 94 45.05 3023 1522 43667 11237 91.0 1.144
-08.0 95 45.54 3058 1558 45174 11386 91.7 1.126
-07.0 96 46.04 3093 1594 46738 11531 92.3 1.109
-06.0 97 46.53 3129 1630 48359 11672 92.9 1.092
-05.0 98 47.03 3164 1667 50038 11810 93.5 1.075
-04.0 99 47.52 3199 1704 51780 11943 94.1 1.058 ! Near Maximum !
-03.0 100 48.02 3234 1742 53586 12072 94.6 1.042 ! Near Maximum !
-02.0 101 48.51 3270 1780 55460 12197 95.1 1.026 ! Near Maximum !
-01.0 102 49.01 3305 1819 57404 12317 95.6 1.010 ! Near Maximum !
+00.0 103 49.50 3340 1858 59423 12433 96.1 0.995 ! Near Maximum !
+01.0 104 50.00 3376 1898 61518 12544 96.6 0.980 !DANGEROUS LOAD-DO NOT USE!
+02.0 105 50.49 3411 1938 63690 12649 97.0 0.965 !DANGEROUS LOAD-DO NOT USE!
+03.0 106 50.99 3446 1978 65934 12749 97.4 0.950 !DANGEROUS LOAD-DO NOT USE!
+04.0 107 51.48 3481 2018 68255 12844 97.7 0.936 !DANGEROUS LOAD-DO NOT USE!
+05.0 108 51.98 3517 2059 70663 12933 98.1 0.921 !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 103 49.50 3435 1965 65257 12550 98.4 0.954 !DANGEROUS LOAD-DO NOT USE!
Data for burning rate decreased by 5% relative to nominal value:
-Ba 103 49.50 3233 1741 53763 12161 92.8 1.040 ! Near Maximum !