243 n160

Bucky5

Beginner
Feb 19, 2009
27
0
Just came into some powder which I have never used before ... N160. I couldn't find very much loading data for N160 online, so I'm requesting a Quickload calc to see if I can come up with a decent load ... if someone has time to run a calc for me. Here's the info for the calc. TIA, Bucky
243 Winchester
N160 powder
Sierra 85 HPBT
22 " barrel
2.600 coal
 
VN160 is a favourite powder for me in standard cartridges such as the 280. Here is a projection for your consideration in your 243 Win.

Code:
Cartridge          : .243 Win.
Bullet             : .243, 85, Sierra HPBT 1530
Useable Case Capaci: 49.804 grain H2O = 3.234 cm³
Cartridge O.A.L. L6: 2.600 inch = 66.04 mm
Barrel Length      : 22.0 inch = 558.8 mm
Powder             : Vihtavuori N160

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   97    42.57   2780    1459   42148  10154     90.0    1.223
-09.0   98    43.04   2812    1493   43598  10290     90.7    1.204
-08.0   99    43.52   2845    1527   45099  10424     91.3    1.186
-07.0  100    43.99   2877    1562   46652  10554     91.9    1.167
-06.0  101    44.46   2909    1597   48254  10682     92.5    1.149
-05.0  102    44.94   2941    1633   49906  10806     93.0    1.132
-04.0  103    45.41   2974    1669   51612  10927     93.6    1.114  ! Near Maximum !
-03.0  104    45.88   3006    1705   53380  11045     94.1    1.097  ! Near Maximum !
-02.0  105    46.35   3038    1742   55211  11159     94.6    1.081  ! Near Maximum !
-01.0  106    46.83   3071    1780   57110  11270     95.1    1.064  ! Near Maximum !
+00.0  107    47.30   3103    1817   59078  11376     95.5    1.048  ! Near Maximum !
+01.0  109    47.77   3135    1855   61118  11479     96.0    1.033  !DANGEROUS LOAD-DO NOT USE!
+02.0  110    48.25   3168    1894   63235  11577     96.4    1.017  !DANGEROUS LOAD-DO NOT USE!
+03.0  111    48.72   3200    1933   65431  11671     96.8    1.002  !DANGEROUS LOAD-DO NOT USE!
+04.0  112    49.19   3233    1972   67710  11761     97.2    0.987  !DANGEROUS LOAD-DO NOT USE!
+05.0  113    49.67   3265    2012   70076  11845     97.5    0.972  !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    107    47.30   3261    2007   69937  11490     99.3    0.972  !DANGEROUS LOAD-DO NOT USE!
Data for burning rate decreased by 10% relative to nominal value:
-Ba    107    47.30   2903    1590   48514  10758     88.2    1.146
 
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