Dr Mike

[George Foster]

Dr. Mike,

I was wondering if you could run two different QL's for me.

Thank You in advance.
243 Win
70 TNT HP Speer
IMR 4831
Rem Case
24" Barrel
26.30COL

243 Win
70TNT HP Speer
IMR4064
Rem Case
24" Barrel
2.630COL

 

[DrMike]

Dr. Mike,

I was wondering if you could run two different QL's for me.

Thank You in advance.
243 Win
70 TNT HP Speer
IMR 4831
Rem Case
24" Barrel
26.30COL

Cartridge : .243 Win.
Bullet : .243, 70, Speer HP TNT 1206
Useable Case Capaci: 51.373 grain H2O = 3.336 cm³
Cartridge O.A.L. L6: 2.630 inch = 66.80 mm
Barrel Length : 24.0 inch = 609.6 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 95 42.93 3133 1525 41915 9685 96.2 1.211
-09.0 96 43.41 3168 1560 43379 9782 96.7 1.192
-08.0 97 43.88 3202 1594 44895 9875 97.1 1.174
-07.0 98 44.36 3237 1629 46462 9962 97.5 1.156
-06.0 99 44.84 3272 1664 48084 10046 97.9 1.138
-05.0 100 45.32 3306 1699 49762 10124 98.3 1.120
-04.0 101 45.79 3340 1734 51499 10197 98.6 1.104 ! Near Maximum !
-03.0 102 46.27 3374 1770 53296 10266 98.9 1.087 ! Near Maximum !
-02.0 103 46.75 3408 1806 55156 10329 99.1 1.070 ! Near Maximum !
-01.0 104 47.22 3442 1842 57082 10386 99.3 1.054 ! Near Maximum !
+00.0 105 47.70 3476 1878 59076 10439 99.5 1.038 ! Near Maximum !
+01.0 106 48.18 3509 1914 61140 10485 99.7 1.023 !DANGEROUS LOAD-DO NOT USE!
+02.0 107 48.65 3543 1951 63279 10526 99.8 1.007 !DANGEROUS LOAD-DO NOT USE!
+03.0 108 49.13 3576 1988 65494 10561 99.9 0.992 !DANGEROUS LOAD-DO NOT USE!
+04.0 109 49.61 3609 2024 67790 10591 100.0 0.978 !DANGEROUS LOAD-DO NOT USE!
+05.0 110 50.09 3642 2061 70169 10614 100.0 0.963 !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 105 47.70 3560 1970 65076 10270 100.0 0.995 !DANGEROUS LOAD-DO NOT USE!
Data for burning rate decreased by 5% relative to nominal value:
-Ba 105 47.70 3375 1771 53151 10455 97.8 1.088 ! Near Maximum !

I had to run this one for a 2.630 inch cartridge. But I do want to see the action on the 26.30 inch cartridge!

 

[DrMike]

Cartridge          : .243 Win.
Bullet             : .243, 70, Speer HP TNT 1206
Useable Case Capaci: 51.373 grain H2O = 3.336 cm³
Cartridge O.A.L. L6: 2.630 inch = 66.80 mm
Barrel Length      : 24.0 inch = 609.6 mm
Powder             : IMR 4064

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   85    38.07   3136    1529   43874   9110     97.4    1.168
-09.0   86    38.49   3167    1559   45210   9194     97.8    1.152
-08.0   87    38.92   3197    1589   46583   9274     98.1    1.136
-07.0   88    39.34   3227    1619   47995   9351     98.4    1.121
-06.0   89    39.76   3258    1649   49446   9425     98.6    1.106
-05.0   90    40.19   3287    1680   50939   9496     98.9    1.091
-04.0   91    40.61   3317    1711   52473   9562     99.1    1.077  ! Near Maximum !
-03.0   92    41.03   3347    1741   54050   9625     99.3    1.063  ! Near Maximum !
-02.0   93    41.45   3377    1772   55672   9685     99.5    1.049  ! Near Maximum !
-01.0   94    41.88   3406    1803   57340   9740     99.6    1.035  ! Near Maximum !
+00.0   95    42.30   3435    1834   59055   9792     99.7    1.022  ! Near Maximum !
+01.0   95    42.72   3464    1865   60819   9840     99.8    1.009  !DANGEROUS LOAD-DO NOT USE!
+02.0   96    43.15   3493    1896   62633   9884     99.9    0.996  !DANGEROUS LOAD-DO NOT USE!
+03.0   97    43.57   3522    1928   64500   9924    100.0    0.983  !DANGEROUS LOAD-DO NOT USE!
+04.0   98    43.99   3550    1959   66420   9960    100.0    0.971  !DANGEROUS LOAD-DO NOT USE!
+05.0   99    44.42   3578    1990   68395   9992    100.0    0.959  !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     95    42.30   3502    1906   63817   9646    100.0    0.987  !DANGEROUS LOAD-DO NOT USE!
Data for burning rate decreased by 5% relative to nominal value:
-Ba     95    42.30   3355    1750   54296   9829     98.5    1.062  ! Near Maximum !

 

[George Foster]

Cartridge : .243 Win.
Bullet : .243, 70, Speer HP TNT 1206
Useable Case Capaci: 51.373 grain H2O = 3.336 cm³
Cartridge O.A.L. L6: 2.630 inch = 66.80 mm
Barrel Length : 24.0 inch = 609.6 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 95 42.93 3133 1525 41915 9685 96.2 1.211
-09.0 96 43.41 3168 1560 43379 9782 96.7 1.192
-08.0 97 43.88 3202 1594 44895 9875 97.1 1.174
-07.0 98 44.36 3237 1629 46462 9962 97.5 1.156
-06.0 99 44.84 3272 1664 48084 10046 97.9 1.138
-05.0 100 45.32 3306 1699 49762 10124 98.3 1.120
-04.0 101 45.79 3340 1734 51499 10197 98.6 1.104 ! Near Maximum !
-03.0 102 46.27 3374 1770 53296 10266 98.9 1.087 ! Near Maximum !
-02.0 103 46.75 3408 1806 55156 10329 99.1 1.070 ! Near Maximum !
-01.0 104 47.22 3442 1842 57082 10386 99.3 1.054 ! Near Maximum !
+00.0 105 47.70 3476 1878 59076 10439 99.5 1.038 ! Near Maximum !
+01.0 106 48.18 3509 1914 61140 10485 99.7 1.023 !DANGEROUS LOAD-DO NOT USE!
+02.0 107 48.65 3543 1951 63279 10526 99.8 1.007 !DANGEROUS LOAD-DO NOT USE!
+03.0 108 49.13 3576 1988 65494 10561 99.9 0.992 !DANGEROUS LOAD-DO NOT USE!
+04.0 109 49.61 3609 2024 67790 10591 100.0 0.978 !DANGEROUS LOAD-DO NOT USE!
+05.0 110 50.09 3642 2061 70169 10614 100.0 0.963 !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 105 47.70 3560 1970 65076 10270 100.0 0.995 !DANGEROUS LOAD-DO NOT USE!
Data for burning rate decreased by 5% relative to nominal value:
-Ba 105 47.70 3375 1771 53151 10455 97.8 1.088 ! Near Maximum !

I had to run this one for a 2.630 inch cartridge. But I do want to see the action on the 26.30 inch cartridge!

I blame it on my fingers being too fat.