7mm STW , 160 Accubond loads
- Thread starter sbsmith
- Start date
- Oct 30, 2004
- 24,388
- 3,298
Start at 70gr.............
Cartridge : 7 mm STW
Bullet : .284, 160, NOS AccuBond 54932
Cartridge O.A.L. L6: 3.650 inch or 92.71 mm
Barrel Length : 26.0 inch or 660.4 mm
Powder : IMR 7828
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 77 60.00 2551 2313 33704 11027 94.5 1.658
-18.0 79 61.50 2614 2427 36021 11336 95.6 1.617
-16.0 81 63.00 2676 2544 38493 11628 96.6 1.569
-14.0 83 64.50 2738 2663 41135 11899 97.4 1.522
-12.0 85 66.00 2800 2785 43959 12150 98.2 1.475
-10.0 87 67.50 2861 2908 46977 12378 98.8 1.430
-08.0 88 69.00 2922 3033 50195 12582 99.3 1.387
-06.0 90 70.50 2982 3160 53596 12762 99.6 1.346
-04.0 92 72.00 3042 3288 57213 12915 99.9 1.307 ! Near Maximum !
-02.0 94 73.50 3101 3417 61066 13040 100.0 1.269 ! Near Maximum !
+00.0 96 75.00 3160 3547 65172 13143 100.0 1.232 ! Near Maximum !
+02.0 98 76.50 3217 3678 69550 13240 100.0 1.197 !DANGEROUS LOAD-DO NOT USE!
+04.0 100 78.00 3274 3809 74222 13334 100.0 1.163 !DANGEROUS LOAD-DO NOT USE!
+06.0 102 79.50 3331 3942 79210 13423 100.0 1.130 !DANGEROUS LOAD-DO NOT USE!
+08.0 104 81.00 3387 4076 84541 13509 100.0 1.098 !DANGEROUS LOAD-DO NOT USE!
+10.0 106 82.50 3443 4211 90245 13590 100.0 1.068 !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 96 75.00 3276 3812 77884 12661 100.0 1.143 !DANGEROUS LOAD-DO NOT USE!
Data for burning rate decreased by 10% relative to nominal value:
-Ba 96 75.00 2985 3166 52624 13376 97.7 1.351
Cartridge : 7 mm STW
Bullet : .284, 160, NOS AccuBond 54932
Cartridge O.A.L. L6: 3.650 inch or 92.71 mm
Barrel Length : 26.0 inch or 660.4 mm
Powder : IMR 7828
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 77 60.00 2551 2313 33704 11027 94.5 1.658
-18.0 79 61.50 2614 2427 36021 11336 95.6 1.617
-16.0 81 63.00 2676 2544 38493 11628 96.6 1.569
-14.0 83 64.50 2738 2663 41135 11899 97.4 1.522
-12.0 85 66.00 2800 2785 43959 12150 98.2 1.475
-10.0 87 67.50 2861 2908 46977 12378 98.8 1.430
-08.0 88 69.00 2922 3033 50195 12582 99.3 1.387
-06.0 90 70.50 2982 3160 53596 12762 99.6 1.346
-04.0 92 72.00 3042 3288 57213 12915 99.9 1.307 ! Near Maximum !
-02.0 94 73.50 3101 3417 61066 13040 100.0 1.269 ! Near Maximum !
+00.0 96 75.00 3160 3547 65172 13143 100.0 1.232 ! Near Maximum !
+02.0 98 76.50 3217 3678 69550 13240 100.0 1.197 !DANGEROUS LOAD-DO NOT USE!
+04.0 100 78.00 3274 3809 74222 13334 100.0 1.163 !DANGEROUS LOAD-DO NOT USE!
+06.0 102 79.50 3331 3942 79210 13423 100.0 1.130 !DANGEROUS LOAD-DO NOT USE!
+08.0 104 81.00 3387 4076 84541 13509 100.0 1.098 !DANGEROUS LOAD-DO NOT USE!
+10.0 106 82.50 3443 4211 90245 13590 100.0 1.068 !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 96 75.00 3276 3812 77884 12661 100.0 1.143 !DANGEROUS LOAD-DO NOT USE!
Data for burning rate decreased by 10% relative to nominal value:
-Ba 96 75.00 2985 3166 52624 13376 97.7 1.351
- Nov 4, 2004
- 25,460
- 9,296
The 160 gr AB is excellent for long range hunting. I am getting excellent accuracy with this bullet in my 280AI with a MV of 3000 fps.
JD338
JD338
jdmason480
Beginner
- Jul 23, 2005
- 93
- 0
I've been shooting the STW for 3 seasons now with the 160gr AB with nothing but excellent results. I've taken bison, deer, antelope, elk and a wild hog. I've been loading RL25 and H1000 and have noticed a little better accuracy with the latter. I just purchased my chronograph so don't know the MV.
- Nov 4, 2004
- 25,460
- 9,296
jdmason480
Congratulations on your success.
Have you recovered any of the 160 gr AB's?
What kind of penetration and expansion are you getting?
Thanks for your imputs.
JD338
Congratulations on your success.
Have you recovered any of the 160 gr AB's?
What kind of penetration and expansion are you getting?
Thanks for your imputs.
JD338
jdmason480
Beginner
- Jul 23, 2005
- 93
- 0
I switched to the AB when they came out after having over-expansion (massive fragmentation actually) problems with the BT's in the 7mmRemMag. Since then, I've taken game from 40 to 451 yds with the AB's. Most of those shots have been broadside through the ribs so I haven't recovered a bullet. I couldn't be more pleased with the performance however.JD338":sin86wak said:
I did take a whitetail at 230 yds through the top shoulder joints and, unfortunately, an antelope through the hips/pelvic bones (This last weekend I underestimated the effects of a 30 mph crosswind at 320 yds). Both shots took out relatively large bones and exited leaving about a nickle-sized wound. There was no sign of bullet fragmentation at all. The AB's seem to perform like partitions except that a Partition will sometimes leave some lead in the meat as it disintegrates to the Partition (I have recovered a Partition in the past).
I plan to get the chrono up and running and out to the range this weekend and will do some comparisons between the RL25 and H1000.
Have you had similar experiences with the AB's?
- Nov 4, 2004
- 25,460
- 9,296
jdmason480
I'll be using the 160 gr AB this comming season so I will post my results.
I've had great success with the 140 gr BT out of a 280 Rem on WT Deer and Caribou. Only recovered one BT on a WT 1/4ing on shot at 150 yds.
I have yet to recover a PT on WT Deer, Mule Deer, Elk, or Blk Bear.
Always get a nice quarter to golf ball size exit wound from any angle.
JD338
I'll be using the 160 gr AB this comming season so I will post my results.
I've had great success with the 140 gr BT out of a 280 Rem on WT Deer and Caribou. Only recovered one BT on a WT 1/4ing on shot at 150 yds.
I have yet to recover a PT on WT Deer, Mule Deer, Elk, or Blk Bear.
Always get a nice quarter to golf ball size exit wound from any angle.
JD338
