243 QL Request

[Bucky5]

Pop,

When you get time, would you please run the following QL cal for me ?

Thanks, Buck

243 Winchester
85 gr Sierra HPBT
H4350 powder
CCI primer
24 " barrel

 

[steve4102]

QL works best with your COAL and case capacity of H2O of a fired case.

Cartridge : .243 Win.
Bullet : .243, 85, Sierra HPBT 1530
Cartridge O.A.L. L6: 2.710 inch or 68.83 mm
Barrel Length : 24.0 inch or 609.6 mm
Powder : Hodgdon H4350

Predicted data by increasing and decreasing the given charge,
incremented in steps of 2.0% 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

-20.0 79 36.00 2649 1325 31159 8921 91.3 1.442
-18.0 81 36.90 2714 1391 33296 9193 92.7 1.405
-16.0 83 37.80 2780 1458 35580 9453 93.9 1.368
-14.0 84 38.70 2845 1527 38023 9699 95.0 1.329
-12.0 86 39.60 2910 1598 40633 9931 96.0 1.289
-10.0 88 40.50 2975 1670 43432 10147 96.9 1.250
-08.0 90 41.40 3039 1743 46430 10346 97.7 1.213
-06.0 92 42.30 3103 1818 49638 10527 98.4 1.177
-04.0 94 43.20 3167 1893 53082 10688 98.9 1.142 ! Near Maximum !
-02.0 96 44.10 3231 1970 56778 10829 99.4 1.109 ! Near Maximum !
+00.0 98 45.00 3293 2047 60744 10948 99.7 1.077 !DANGEROUS LOAD-DO NOT USE!
+02.0 100 45.90 3356 2125 64972 11046 99.9 1.046 !DANGEROUS LOAD-DO NOT USE!
+04.0 102 46.80 3417 2204 69495 11120 100.0 1.016 !DANGEROUS LOAD-DO NOT USE!
+06.0 104 47.70 3478 2284 74347 11177 100.0 0.987 !DANGEROUS LOAD-DO NOT USE!
+08.0 106 48.60 3539 2363 79557 11231 100.0 0.959 !DANGEROUS LOAD-DO NOT USE!
+10.0 108 49.50 3598 2444 85157 11281 100.0 0.932 !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 98 45.00 3428 2218 72735 10561 100.0 0.999 !DANGEROUS LOAD-DO NOT USE!
Data for burning rate decreased by 10% relative to nominal value:
-Ba 98 45.00 3100 1813 49361 10852 95.5 1.178