QL request 270 WSM

mkk · Apr 23, 2022

Ruger M77 270 WSM
22" barrel 1/10
Hornady 145 ELD-X
Federal 1x fired brass
CCI #34
H4831sc

Thanks
Mike

TackDriver284 · Apr 23, 2022

Code:

Cartridge          : .270 WSM
Bullet             : .277, 145, Hornady ELD-X 27356
Useable Case Capaci: 71.184 grain H2O = 4.622 cm³
Cartridge O.A.L. L6: 2.860 inch = 72.64 mm
Barrel Length      : 22.0 inch = 558.8 mm
Powder             : Hodgdon H4831 SC *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   88    58.50   2704    2354   44930  12614     94.1    1.292
-09.0   89    59.15   2735    2409   46436  12773     94.6    1.273
-08.0   90    59.80   2766    2464   47986  12929     95.1    1.253
-07.0   91    60.45   2797    2519   49582  13081     95.6    1.233
-06.0   92    61.10   2828    2576   51229  13228     96.0    1.214
-05.0   93    61.75   2860    2633   52933  13372     96.5    1.196
-04.0   94    62.40   2891    2690   54694  13511     96.8    1.177  ! Near Maximum !
-03.0   95    63.05   2922    2749   56516  13645     97.2    1.159  ! Near Maximum !
-02.0   96    63.70   2953    2807   58400  13774     97.6    1.142  ! Near Maximum !
-01.0   97    64.35   2984    2867   60350  13898     97.9    1.125  ! Near Maximum !
+00.0   98    65.00   3015    2927   62369  14017     98.2    1.107  ! Near Maximum !
+01.0   99    65.65   3046    2988   64458  14131     98.5    1.091  !DANGEROUS LOAD-DO NOT USE!
+02.0  100    66.30   3077    3049   66622  14239     98.8    1.074  !DANGEROUS LOAD-DO NOT USE!
+03.0  101    66.95   3108    3111   68862  14341     99.0    1.058  !DANGEROUS LOAD-DO NOT USE!
+04.0  102    67.60   3139    3173   71184  14438     99.2    1.042  !DANGEROUS LOAD-DO NOT USE!
+05.0  103    68.25   3170    3236   73590  14528     99.4    1.027  !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     98    65.00   3154    3202   73910  13809    100.0    1.027  !DANGEROUS LOAD-DO NOT USE!
Data for burning rate decreased by 10% relative to nominal value:
-Ba     98    65.00   2830    2578   51052  13526     92.3    1.211

mkk · Apr 23, 2022

Thank you sir. Would you run the same QL with H1000?

TackDriver284 · Apr 23, 2022

Code:

Cartridge          : .270 WSM
Bullet             : .277, 145, Hornady ELD-X 27356
Useable Case Capaci: 71.184 grain H2O = 4.622 cm³
Cartridge O.A.L. L6: 2.860 inch = 72.64 mm
Barrel Length      : 22.0 inch = 558.8 mm
Powder             : Hodgdon H1000 *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   97    63.00   2703    2352   42370  13180     94.2    1.317
-09.0   98    63.70   2737    2413   43912  13355     94.8    1.294
-08.0   99    64.40   2772    2475   45515  13523     95.4    1.272
-07.0  100    65.10   2808    2538   47184  13684     96.0    1.250
-06.0  101    65.80   2843    2602   48924  13838     96.5    1.229
-05.0  102    66.50   2878    2667   50734  13985     97.0    1.207
-04.0  104    67.20   2913    2732   52623  14125     97.4    1.187
-03.0  105    67.90   2949    2799   54590  14256     97.9    1.166  ! Near Maximum !
-02.0  106    68.60   2984    2867   56642  14379     98.2    1.146  ! Near Maximum !
-01.0  107    69.30   3019    2935   58764  14493     98.6    1.126  ! Near Maximum !
+00.0  108    70.00   3055    3004   61020  14599     98.9    1.107  ! Near Maximum !
+01.0  109    70.70   3090    3074   63353  14695     99.2    1.088  !DANGEROUS LOAD-DO NOT USE!
+02.0  110    71.40   3125    3145   65796  14781     99.4    1.069  !DANGEROUS LOAD-DO NOT USE!
+03.0  111    72.10   3161    3217   68348  14858     99.6    1.051  !DANGEROUS LOAD-DO NOT USE!
+04.0  112    72.80   3196    3289   71018  14924     99.8    1.032  !DANGEROUS LOAD-DO NOT USE!
+05.0  113    73.50   3232    3362   73814  14980     99.9    1.014  !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    70.00   3215    3328   74689  14125    100.0    1.017  !DANGEROUS LOAD-DO NOT USE!
Data for burning rate decreased by 10% relative to nominal value:
-Ba    108    70.00   2831    2581   49274  14088     92.2    1.223