270 WSM 140 gr Accubonds and Reloader 22 loads Needed
- Thread starter 2elkhunt
- Start date
The number 5 Nosler Manual does not list RL 22 for use with the 140 grain bullets.
However, the number 5 edition of the Sierra manual does. For the 270 WSM using 140 grain bullets Sierra lists a starting load of RL 22 of 61.1 grains for 2900 fps. The maximum load listed for RL 22 is 64.9 grains for 3100 fps.
Working up to 65 grains of RL 22 behind the 140 AccuBond using Winchester brass and a Fed215M primer, I am getting good groups and 3120 fps. Pretty close to the data that Sierra shows.
Hope this helps, R F
However, the number 5 edition of the Sierra manual does. For the 270 WSM using 140 grain bullets Sierra lists a starting load of RL 22 of 61.1 grains for 2900 fps. The maximum load listed for RL 22 is 64.9 grains for 3100 fps.
Working up to 65 grains of RL 22 behind the 140 AccuBond using Winchester brass and a Fed215M primer, I am getting good groups and 3120 fps. Pretty close to the data that Sierra shows.
Hope this helps, R F
- Oct 30, 2004
- 24,275
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Cartridge : .270 Win Short Mag [WSM]
Bullet : .277, 140, NOS AccuBond 54765
Cartridge O.A.L. L6: 2.860 inch or 72.64 mm
Barrel Length : 24.0 inch or 609.6 mm
Powder : Alliant Reloder-22
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 81 51.20 2491 1929 30610 10289 90.0 1.575
-18.0 83 52.48 2556 2030 32730 10631 91.4 1.534
-16.0 85 53.76 2620 2134 35003 10962 92.6 1.493
-14.0 87 55.04 2685 2241 37440 11280 93.8 1.453
-12.0 89 56.32 2750 2351 40053 11583 94.9 1.407
-10.0 91 57.60 2815 2463 42859 11869 95.9 1.363
-08.0 93 58.88 2880 2578 45872 12139 96.8 1.320
-06.0 95 60.16 2945 2695 49093 12389 97.6 1.279
-04.0 97 61.44 3009 2815 52516 12618 98.3 1.240
-02.0 99 62.72 3074 2937 56177 12826 98.9 1.202 ! Near Maximum !
+00.0 101 64.00 3138 3061 60099 13010 99.3 1.166 ! Near Maximum !
+02.0 103 65.28 3202 3187 64305 13169 99.7 1.130 !DANGEROUS LOAD-DO NOT USE!
+04.0 105 66.56 3265 3314 68817 13303 99.9 1.096 !DANGEROUS LOAD-DO NOT USE!
+06.0 107 67.84 3328 3444 73665 13410 100.0 1.064 !DANGEROUS LOAD-DO NOT USE!
+08.0 109 69.12 3391 3575 78879 13493 100.0 1.032 !DANGEROUS LOAD-DO NOT USE!
+10.0 111 70.40 3453 3707 84495 13570 100.0 1.001 !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 101 64.00 3283 3350 72754 12587 100.0 1.075 !DANGEROUS LOAD-DO NOT USE!
Data for burning rate decreased by 10% relative to nominal value:
-Ba 101 64.00 2934 2676 47944 12741 94.0 1.285
63-65 always worked in the various WSM's I used.
Bullet : .277, 140, NOS AccuBond 54765
Cartridge O.A.L. L6: 2.860 inch or 72.64 mm
Barrel Length : 24.0 inch or 609.6 mm
Powder : Alliant Reloder-22
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 81 51.20 2491 1929 30610 10289 90.0 1.575
-18.0 83 52.48 2556 2030 32730 10631 91.4 1.534
-16.0 85 53.76 2620 2134 35003 10962 92.6 1.493
-14.0 87 55.04 2685 2241 37440 11280 93.8 1.453
-12.0 89 56.32 2750 2351 40053 11583 94.9 1.407
-10.0 91 57.60 2815 2463 42859 11869 95.9 1.363
-08.0 93 58.88 2880 2578 45872 12139 96.8 1.320
-06.0 95 60.16 2945 2695 49093 12389 97.6 1.279
-04.0 97 61.44 3009 2815 52516 12618 98.3 1.240
-02.0 99 62.72 3074 2937 56177 12826 98.9 1.202 ! Near Maximum !
+00.0 101 64.00 3138 3061 60099 13010 99.3 1.166 ! Near Maximum !
+02.0 103 65.28 3202 3187 64305 13169 99.7 1.130 !DANGEROUS LOAD-DO NOT USE!
+04.0 105 66.56 3265 3314 68817 13303 99.9 1.096 !DANGEROUS LOAD-DO NOT USE!
+06.0 107 67.84 3328 3444 73665 13410 100.0 1.064 !DANGEROUS LOAD-DO NOT USE!
+08.0 109 69.12 3391 3575 78879 13493 100.0 1.032 !DANGEROUS LOAD-DO NOT USE!
+10.0 111 70.40 3453 3707 84495 13570 100.0 1.001 !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 101 64.00 3283 3350 72754 12587 100.0 1.075 !DANGEROUS LOAD-DO NOT USE!
Data for burning rate decreased by 10% relative to nominal value:
-Ba 101 64.00 2934 2676 47944 12741 94.0 1.285
63-65 always worked in the various WSM's I used.
