256 win. magnum Q/L

[wildman]

10 inch barrel ,60 grain Hornady flat point ,LiLgun powder ,Remington 6 1/2 primer ,Winchester brass.

 

[jimbires]

Cartridge          : .256 Win. Mag.
Bullet             : .257, 60, Hornady FP 2510
Useable Case Capaci: 19.443 grain H2O = 1.262 cm³
Cartridge O.A.L. L6: 1.590 inch = 40.39 mm
Barrel Length      : 10.0 inch = 254.0 mm
Powder             : Hodgdon Lil'Gun

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   74    13.76   2015     541   26440   8359     90.6    0.768
-18.0   76    14.10   2066     569   28260   8629     91.9    0.746
-16.0   78    14.45   2117     597   30188   8889     93.1    0.725
-14.0   79    14.79   2168     626   32222   9140     94.3    0.705
-12.0   81    15.14   2219     656   34378   9378     95.3    0.685
-10.0   83    15.48   2270     687   36676   9605     96.2    0.666
-08.0   85    15.82   2321     718   39127   9818     97.1    0.646
-06.0   87    16.17   2372     750   41741  10016     97.8    0.627
-04.0   89    16.51   2423     782   44529  10199     98.4    0.608  ! Near Maximum !
-02.0   91    16.86   2473     815   47503  10365     98.9    0.590  ! Near Maximum !
+00.0   92    17.20   2523     848   50679  10513     99.4    0.573  !DANGEROUS LOAD-DO NOT USE!
+02.0   94    17.54   2573     882   54070  10643     99.7    0.556  !DANGEROUS LOAD-DO NOT USE!
+04.0   96    17.89   2623     916   57693  10754     99.9    0.540  !DANGEROUS LOAD-DO NOT USE!
+06.0   98    18.23   2672     951   61569  10846    100.0    0.525  !DANGEROUS LOAD-DO NOT USE!
+08.0  100    18.58   2720     986   65718  10920    100.0    0.510  !DANGEROUS LOAD-DO NOT USE!
+10.0  102    18.92   2769    1021   70163  10989    100.0    0.495  !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     92    17.20   2643     931   61713  10154    100.0    0.527  !DANGEROUS LOAD-DO NOT USE!
Data for burning rate decreased by 10% relative to nominal value:
-Ba     92    17.20   2354     738   40042  10313     94.1    0.635

 

[wildman]

Thank you very much jimbires !!