Quick load request

[trapper10]

.270 Win/ 24" Barell / 130 Ballistic Tip/ 70 Grains of water with convex bead at the mouth.
Vihtavuori N560 and N565
I thank you in advance!

 

[DrMike]

Cartridge          : .270 Win. (SAAMI)
Bullet             : .277, 130, Nosler BalTip 27130
Useable Case Capaci: 63.843 grain H2O = 4.145 cm³
Cartridge O.A.L. L6: 3.340 inch = 84.84 mm
Barrel Length      : 24.0 inch = 609.6 mm
Powder             : Vihtavuori N565 *C*T

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  101    60.93   2875    2386   43374  11983     92.1    1.300
-09.0  102    61.61   2913    2449   45092  12144     92.7    1.276
-08.0  103    62.28   2951    2513   46874  12300     93.4    1.253
-07.0  104    62.96   2989    2578   48725  12451     94.0    1.231
-06.0  105    63.64   3027    2644   50648  12597     94.6    1.209
-05.0  106    64.32   3065    2712   52655  12737     95.2    1.188
-04.0  108    64.99   3103    2780   54749  12871     95.7    1.166
-03.0  109    65.67   3141    2849   56934  12999     96.2    1.146  ! Near Maximum !
-02.0  110    66.35   3180    2919   59216  13121     96.7    1.125  ! Near Maximum !
-01.0  111    67.02   3218    2989   61600  13235     97.1    1.105  ! Near Maximum !
+00.0  112    67.70   3257    3061   64092  13343     97.6    1.085  ! Near Maximum !
+01.0  113    68.38   3295    3134   66697  13443     97.9    1.066  !DANGEROUS LOAD-DO NOT USE!
+02.0  114    69.05   3334    3208   69423  13536     98.3    1.047  !DANGEROUS LOAD-DO NOT USE!
+03.0  115    69.73   3372    3282   72276  13621     98.6    1.028  !DANGEROUS LOAD-DO NOT USE!
+04.0  116    70.41   3411    3358   75265  13697     98.9    1.010  !DANGEROUS LOAD-DO NOT USE!
+05.0  118    71.09   3449    3434   78397  13765     99.2    0.992  !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    112    67.70   3357    3253   71794  13316     99.4    1.035  !DANGEROUS LOAD-DO NOT USE!
Data for burning rate decreased by 5% relative to nominal value:
-Ba    112    67.70   3140    2845   56600  13157     94.4    1.144  ! Near Maximum !

 

[DrMike]

Cartridge          : .270 Win. (SAAMI)
Bullet             : .277, 130, Nosler BalTip 27130
Useable Case Capaci: 63.843 grain H2O = 4.145 cm³
Cartridge O.A.L. L6: 3.340 inch = 84.84 mm
Barrel Length      : 24.0 inch = 609.6 mm
Powder             : Vihtavuori N560 *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   96    57.96   2918    2457   44778  12106     92.1    1.260
-09.0   97    58.60   2954    2519   46393  12268     92.8    1.239
-08.0   99    59.25   2990    2581   48069  12426     93.4    1.218
-07.0  100    59.89   3026    2644   49813  12580     94.0    1.198
-06.0  101    60.54   3063    2707   51625  12728     94.5    1.179
-05.0  102    61.18   3099    2772   53511  12872     95.1    1.159
-04.0  103    61.82   3135    2838   55473  13010     95.6    1.140  ! Near Maximum !
-03.0  104    62.47   3172    2904   57509  13143     96.1    1.122  ! Near Maximum !
-02.0  105    63.11   3208    2971   59640  13271     96.5    1.103  ! Near Maximum !
-01.0  106    63.76   3245    3039   61857  13392     97.0    1.085  ! Near Maximum !
+00.0  107    64.40   3281    3108   64164  13507     97.4    1.067  ! Near Maximum !
+01.0  108    65.04   3318    3178   66571  13616     97.7    1.050  !DANGEROUS LOAD-DO NOT USE!
+02.0  109    65.69   3354    3248   69080  13719     98.1    1.033  !DANGEROUS LOAD-DO NOT USE!
+03.0  110    66.33   3391    3319   71697  13814     98.4    1.016  !DANGEROUS LOAD-DO NOT USE!
+04.0  111    66.98   3427    3391   74430  13903     98.7    0.999  !DANGEROUS LOAD-DO NOT USE!
+05.0  112    67.62   3464    3464   77279  13985     99.0    0.983  !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    107    64.40   3377    3292   71307  13514     99.2    1.021  !DANGEROUS LOAD-DO NOT USE!
Data for burning rate decreased by 5% relative to nominal value:
-Ba    107    64.40   3171    2903   57495  13301     94.3    1.119  ! Near Maximum !

 

[trapper10]

Thanks Mike

 

[SJB358]

Boy I need to score some 560…. Looks like a bomber in the 270..

 

[trapper10]

Boy I need to score some 560…. Looks like a bomber in the 270..

I was on their site. Prompted me to buy some. Do you have experience with N565 and 570 in any cartridges?

 

[SJB358]

I use a fair amount of 570 in the RUM and the 7 Mashburn Super. Amazing powder.