Thread: High Pressure signs?

Cartridge : 6.5 Creedmoor Hornady
Bullet : .264, 140, Hornady ELD-M 26331
Useable Case Capaci: 47.551 grain H2O = 3.087 cm³
Cartridge O.A.L. L6: 2.800 inch = 71.12 mm
Barrel Length : 24.0 inch = 609.6 mm
Powder : Hodgdon H4350 *T

Predicted data by increasing and decreasing the given charge,
incremented in steps of 0.469% 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

-04.7 95 40.60 2606 2112 49550 9061 97.6 1.321
-04.2 95 40.80 2618 2131 50254 9100 97.7 1.313
-03.8 96 41.00 2630 2151 50968 9138 97.9 1.304
-03.3 96 41.20 2642 2170 51692 9176 98.0 1.296
-02.8 97 41.40 2654 2190 52426 9213 98.1 1.287
-02.3 97 41.60 2666 2210 53171 9249 98.3 1.279
-01.9 97 41.80 2678 2229 53926 9285 98.4 1.271 ! Near Maximum !
-01.4 98 42.00 2690 2249 54692 9320 98.5 1.263 ! Near Maximum !
-00.9 98 42.20 2702 2269 55469 9354 98.6 1.255 ! Near Maximum !
-00.5 99 42.40 2713 2289 56258 9388 98.7 1.247 ! Near Maximum !
+00.0 99 42.60 2725 2309 57057 9421 98.8 1.239 ! Near Maximum !
+00.5 100 42.80 2737 2329 57869 9454 98.9 1.231 ! Near Maximum !
+00.9 100 43.00 2749 2349 58691 9486 99.0 1.224 ! Near Maximum !
+01.4 101 43.20 2761 2369 59526 9517 99.1 1.216 ! Near Maximum !
+01.9 101 43.40 2773 2390 60373 9547 99.2 1.208 ! Near Maximum !
+02.3 102 43.60 2784 2410 61233 9577 99.2 1.201 ! Near Maximum !

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 99 42.60 2834 2497 66997 9178 100.0 1.158 !DANGEROUS LOAD-DO NOT USE!
Data for burning rate decreased by 10% relative to nominal value:
-Ba 99 42.60 2576 2063 47289 9233 93.8 1.345

Originally Posted by spada

Cartridge : 6.5 Creedmoor Hornady
Bullet : .264, 140, Hornady ELD-M 26331
Useable Case Capaci: 47.551 grain H2O = 3.087 cm³
Cartridge O.A.L. L6: 2.800 inch = 71.12 mm
Barrel Length : 24.0 inch = 609.6 mm
Powder : Hodgdon H4350 *T

Predicted data by increasing and decreasing the given charge,
incremented in steps of 0.469% 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

-04.7 95 40.60 2606 2112 49550 9061 97.6 1.321
-04.2 95 40.80 2618 2131 50254 9100 97.7 1.313
-03.8 96 41.00 2630 2151 50968 9138 97.9 1.304
-03.3 96 41.20 2642 2170 51692 9176 98.0 1.296
-02.8 97 41.40 2654 2190 52426 9213 98.1 1.287
-02.3 97 41.60 2666 2210 53171 9249 98.3 1.279
-01.9 97 41.80 2678 2229 53926 9285 98.4 1.271 ! Near Maximum !
-01.4 98 42.00 2690 2249 54692 9320 98.5 1.263 ! Near Maximum !
-00.9 98 42.20 2702 2269 55469 9354 98.6 1.255 ! Near Maximum !
-00.5 99 42.40 2713 2289 56258 9388 98.7 1.247 ! Near Maximum !
+00.0 99 42.60 2725 2309 57057 9421 98.8 1.239 ! Near Maximum !
+00.5 100 42.80 2737 2329 57869 9454 98.9 1.231 ! Near Maximum !
+00.9 100 43.00 2749 2349 58691 9486 99.0 1.224 ! Near Maximum !
+01.4 101 43.20 2761 2369 59526 9517 99.1 1.216 ! Near Maximum !
+01.9 101 43.40 2773 2390 60373 9547 99.2 1.208 ! Near Maximum !
+02.3 102 43.60 2784 2410 61233 9577 99.2 1.201 ! Near Maximum !

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 99 42.60 2834 2497 66997 9178 100.0 1.158 !DANGEROUS LOAD-DO NOT USE!
Data for burning rate decreased by 10% relative to nominal value:
-Ba 99 42.60 2576 2063 47289 9233 93.8 1.345

Thanks a mil @spada!


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