6MM 75HP Sierra

George Foster

Beginner
Dec 4, 2005
227
90
I was wondering if Dr. Mike could run a QL for the following for me:

6mm Rem
RL19 Powder
75HP Sierra
Rem Case
Fed210M Primer
24" barrel
2.820COL
 
Code:
Cartridge          : 6 mm Rem.  (SAAMI)
Bullet             : .243, 75, Sierra HP 1510
Useable Case Capaci: 51.846 grain H2O = 3.366 cm³
Cartridge O.A.L. L6: 2.820 inch = 71.63 mm
Barrel Length      : 24.0 inch = 609.6 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   98    46.62   3238    1746   44973  11137     91.0    1.134
-09.0   99    47.14   3277    1788   46566  11286     91.7    1.116
-08.0  100    47.66   3316    1831   48227  11433     92.3    1.098
-07.0  101    48.17   3355    1874   49951  11575     92.9    1.080
-06.0  102    48.69   3394    1918   51740  11714     93.5    1.063
-05.0  103    49.21   3433    1962   53598  11849     94.0    1.046
-04.0  104    49.73   3472    2007   55529  11979     94.6    1.029  ! Near Maximum !
-03.0  105    50.25   3511    2053   57537  12105     95.1    1.013  ! Near Maximum !
-02.0  106    50.76   3550    2099   59626  12227     95.6    0.997  ! Near Maximum !
-01.0  107    51.28   3589    2146   61797  12343     96.1    0.981  ! Near Maximum !
+00.0  108    51.80   3629    2193   64058  12454     96.5    0.966  ! Near Maximum !
+01.0  109    52.32   3668    2240   66410  12561     96.9    0.950  !DANGEROUS LOAD-DO NOT USE!
+02.0  111    52.84   3707    2289   68860  12661     97.3    0.935  !DANGEROUS LOAD-DO NOT USE!
+03.0  112    53.35   3746    2337   71413  12756     97.7    0.920  !DANGEROUS LOAD-DO NOT USE!
+04.0  113    53.87   3786    2387   74072  12845     98.0    0.906  !DANGEROUS LOAD-DO NOT USE!
+05.0  114    54.39   3825    2436   76845  12929     98.4    0.892  !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    108    51.80   3817    2426   76990  12467     99.8    0.893  !DANGEROUS LOAD-DO NOT USE!
Data for burning rate decreased by 10% relative to nominal value:
-Ba    108    51.80   3384    1908   52205  11812     89.2    1.059
 
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