I talked to Hornady and they are discontinuing the 270 Interbond in 150Grain. I ordered a few boxes. From what I've researched, they are very similiar to the AccuBond. This winter I would like to try some different powders but would like some quickloads on: Magpro, N170 and H4831SC. It will be fun to see how they compare with the ballistics' I'm getting with the 270 WSM with my current loads. This is for my 270 WSM. TIA
Quickload for 270WSM and 150G Interbonds
- Thread starter Pineman
- Start date
DrMike
Ballistician
- Nov 8, 2006
- 37,159
- 5,608
Code:
Cartridge : .270 WSM
Bullet : .277, 150, Hornady Interbond 27409
Useable Case Capaci: 70.650 grain H2O = 4.587 cm³
Cartridge O.A.L. L6: 2.860 inch = 72.64 mm
Barrel Length : 24.0 inch = 609.6 mm
Powder : Vihtavuori N170 *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
-10.0 100 64.35 2688 2407 43877 11646 89.8 1.417
-09.0 101 65.07 2722 2468 45460 11810 90.5 1.393
-08.0 102 65.78 2756 2530 47103 11972 91.1 1.370
-07.0 103 66.50 2790 2592 48811 12130 91.7 1.347
-06.0 104 67.21 2824 2656 50585 12284 92.3 1.324
-05.0 105 67.93 2858 2720 52429 12435 92.9 1.302
-04.0 107 68.64 2892 2786 54347 12583 93.5 1.280 ! Near Maximum !
-03.0 108 69.36 2926 2852 56342 12726 94.0 1.258 ! Near Maximum !
-02.0 109 70.07 2961 2919 58418 12864 94.5 1.237 ! Near Maximum !
-01.0 110 70.79 2995 2988 60579 12999 95.0 1.216 ! Near Maximum !
+00.0 111 71.50 3030 3057 62829 13128 95.5 1.196 ! Near Maximum !
+01.0 112 72.22 3064 3127 65173 13253 96.0 1.176 !DANGEROUS LOAD-DO NOT USE!
+02.0 113 72.93 3099 3199 67616 13372 96.4 1.156 !DANGEROUS LOAD-DO NOT USE!
+03.0 114 73.65 3134 3271 70163 13486 96.8 1.136 !DANGEROUS LOAD-DO NOT USE!
+04.0 115 74.36 3169 3344 72821 13595 97.2 1.117 !DANGEROUS LOAD-DO NOT USE!
+05.0 117 75.08 3204 3418 75595 13697 97.6 1.099 !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 111 71.50 3118 3239 69184 13257 97.9 1.145 !DANGEROUS LOAD-DO NOT USE!
Data for burning rate decreased by 5% relative to nominal value:
-Ba 111 71.50 2929 2858 56598 12842 92.1 1.254 ! Near Maximum !DrMike
Ballistician
- Nov 8, 2006
- 37,159
- 5,608
Code:
Cartridge : .270 WSM
Bullet : .277, 150, Hornady Interbond 27409
Useable Case Capaci: 70.650 grain H2O = 4.587 cm³
Cartridge O.A.L. L6: 2.860 inch = 72.64 mm
Barrel Length : 24.0 inch = 609.6 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 57.87 2737 2496 45322 11507 95.6 1.368
-09.0 89 58.51 2768 2552 46826 11640 96.0 1.347
-08.0 90 59.16 2798 2608 48374 11770 96.5 1.327
-07.0 91 59.80 2829 2665 49971 11895 96.9 1.306
-06.0 92 60.44 2859 2723 51623 12017 97.2 1.287
-05.0 93 61.09 2890 2781 53330 12134 97.6 1.267
-04.0 94 61.73 2920 2840 55094 12247 97.9 1.248 ! Near Maximum !
-03.0 95 62.37 2951 2900 56919 12356 98.2 1.230 ! Near Maximum !
-02.0 96 63.01 2981 2960 58806 12459 98.5 1.211 ! Near Maximum !
-01.0 97 63.66 3011 3020 60758 12558 98.8 1.193 ! Near Maximum !
+00.0 98 64.30 3042 3081 62777 12652 99.0 1.176 ! Near Maximum !
+01.0 99 64.94 3072 3143 64867 12741 99.2 1.158 !DANGEROUS LOAD-DO NOT USE!
+02.0 100 65.59 3102 3205 67031 12824 99.4 1.141 !DANGEROUS LOAD-DO NOT USE!
+03.0 101 66.23 3132 3267 69271 12903 99.5 1.124 !DANGEROUS LOAD-DO NOT USE!
+04.0 102 66.87 3162 3330 71591 12975 99.7 1.108 !DANGEROUS LOAD-DO NOT USE!
+05.0 103 67.52 3192 3394 73995 13042 99.8 1.092 !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 98 64.30 3112 3226 68536 12550 99.9 1.132 !DANGEROUS LOAD-DO NOT USE!
Data for burning rate decreased by 5% relative to nominal value:
-Ba 98 64.30 2959 2916 57080 12593 97.0 1.226 ! Near Maximum !DrMike
Ballistician
- Nov 8, 2006
- 37,159
- 5,608
Code:
Cartridge : .270 WSM
Bullet : .277, 150, Hornady Interbond 27409
Useable Case Capaci: 70.650 grain H2O = 4.587 cm³
Cartridge O.A.L. L6: 2.860 inch = 72.64 mm
Barrel Length : 24.0 inch = 609.6 mm
Powder : Accurate MAGPRO
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 89 61.83 2785 2583 44385 12694 94.0 1.394
-09.0 90 62.52 2818 2646 45946 12854 94.5 1.372
-08.0 91 63.20 2852 2709 47563 13009 95.1 1.349
-07.0 92 63.89 2885 2773 49238 13159 95.6 1.328
-06.0 93 64.58 2919 2838 50972 13303 96.0 1.306
-05.0 94 65.27 2953 2904 52770 13443 96.5 1.285
-04.0 95 65.95 2986 2970 54632 13578 96.9 1.265 ! Near Maximum !
-03.0 96 66.64 3020 3037 56561 13706 97.3 1.244 ! Near Maximum !
-02.0 97 67.33 3053 3105 58562 13829 97.7 1.224 ! Near Maximum !
-01.0 98 68.01 3087 3174 60636 13946 98.0 1.205 ! Near Maximum !
+00.0 99 68.70 3120 3243 62787 14056 98.4 1.186 ! Near Maximum !
+01.0 100 69.39 3154 3313 65018 14160 98.6 1.167 !DANGEROUS LOAD-DO NOT USE!
+02.0 101 70.07 3187 3384 67333 14258 98.9 1.148 !DANGEROUS LOAD-DO NOT USE!
+03.0 102 70.76 3221 3455 69736 14348 99.1 1.130 !DANGEROUS LOAD-DO NOT USE!
+04.0 103 71.45 3254 3527 72230 14432 99.4 1.112 !DANGEROUS LOAD-DO NOT USE!
+05.0 104 72.14 3287 3599 74821 14508 99.5 1.095 !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 99 68.70 3207 3425 69532 13977 99.7 1.134 !DANGEROUS LOAD-DO NOT USE!
Data for burning rate decreased by 5% relative to nominal value:
-Ba 99 68.70 3019 3037 56168 13927 95.7 1.244 ! Near Maximum !- Thread starter
- #5
