Been awhile since I have been on, I am looking for a new powder for my 280AI. Been shooting 168 vld bullets with reloader 25 and getting great groups. I'm not happy with the speed so I want a new direction for a bit more zip. I only want temp stable powders. Right now with a 26" barrel I'm getting 2830fps with my current load of 59.3 gr rl25 and a 168 vld
280AI powder
- Thread starter muzz
- Start date
DrMike
Ballistician
- Nov 8, 2006
- 37,311
- 5,974
Right off the bat, you have room to increase your charge in order to elevate velocity.
Then, there are a variety of powders that will give you good velocities.
Code:
Cartridge : .280 Ack Imp
Bullet : .284, 168, Berger Hunt VLD G7 #28501
Useable Case Capaci: 64.327 grain H2O = 4.177 cm³
Cartridge O.A.L. L6: 3.330 inch = 84.58 mm
Barrel Length : 26.0 inch = 660.4 mm
Powder : Alliant Reloder-25
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 87 51.52 2432 2207 31707 9546 97.0 1.676
-18.0 90 52.81 2495 2322 33960 9786 97.9 1.629
-16.0 92 54.10 2557 2439 36381 10003 98.7 1.584
-14.0 94 55.38 2619 2558 38984 10196 99.3 1.534
-12.0 96 56.67 2680 2680 41786 10361 99.7 1.485
-10.0 98 57.96 2741 2804 44806 10499 99.9 1.437
-08.0 100 59.25 2802 2929 48061 10607 100.0 1.392
-06.0 103 60.54 2862 3055 51576 10701 100.0 1.347
-04.0 105 61.82 2921 3182 55374 10790 100.0 1.305 ! Near Maximum !
-02.0 107 63.11 2979 3311 59485 10876 100.0 1.264 ! Near Maximum !
+00.0 109 64.40 3037 3441 63940 10958 100.0 1.225 ! Near Maximum !
+02.0 111 65.69 3095 3573 68775 11036 100.0 1.187 !DANGEROUS LOAD-DO NOT USE!
+04.0 114 66.98 3152 3707 74031 11109 100.0 1.150 !DANGEROUS LOAD-DO NOT USE!
+06.0 116 68.26 3209 3842 79756 11178 100.0 1.115 !DANGEROUS LOAD-DO NOT USE!
+08.0 118 69.55 3266 3980 86006 11242 100.0 1.081 !DANGEROUS LOAD-DO NOT USE!
+10.0 120 70.84 3323 4119 92837 11300 100.0 1.048 !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 109 64.40 3147 3694 79214 10527 100.0 1.132 !DANGEROUS LOAD-DO NOT USE!
Data for burning rate decreased by 10% relative to nominal value:
-Ba 109 64.40 2867 3067 50926 11486 99.3 1.348Then, there are a variety of powders that will give you good velocities.
Code:
Cartridge : .280 Ack Imp
Bullet : .284, 168, Berger Hunt VLD G7 #28501
Useable Case Capaci: 64.327 grain H2O = 4.177 cm³
Cartridge O.A.L. L6: 3.330 inch = 84.58 mm
Barrel Length : 26.0 inch = 660.4 mm
Predicted Data for Indicated Charges of the Following Powders.
Matching Maximum Pressure: 64150 psi, or 442 MPa
or a maximum loading ratio or filling of 110 %
These calculations refer to your specified settings in QuickLOAD 'Cartridge Dimensions' window.
C A U T I O N : any load listed can result in a powder charge that falls below minimum suggested
loads or exceeds maximum suggested loads as presented in current handloading manuals. Understand
that all of the listed powders can be unsuitable for the given combination of cartridge, bullet
and gun. Actual load order can vary, depending upon lot-to-lot powder and component variations.
USE ONLY FOR COMPARISON !
11 loads produced a Loading Ratio below user-defined minimum of 90%. These powders have been skipped.
Powder type Filling/Loading Ratio Charge Charge Vel. Prop.Burnt P max P muzz B_Time
% Grains Gramm fps % psi psi ms
--------------------------------- -----------------------------------------------------------------
Alliant Reloder-26 100.2 63.9 4.14 3058 100.0 64150 11252 1.237 ! Near Maximum !
Vihtavuori N560 103.0 62.4 4.04 3042 99.4 64150 11853 1.228 ! Near Maximum !
Norma MRP 101.2 62.6 4.06 3041 100.0 64150 11409 1.234 ! Near Maximum !
Alliant Reloder-25 109.3 64.5 4.18 3040 100.0 64150 10962 1.223 ! Near Maximum !
Accurate MAGPRO 103.3 65.1 4.22 3035 98.5 64150 11974 1.235 ! Near Maximum !
Vihtavuori N570 110.0 68.8 4.46 3030 96.2 58673 12916 1.267 ! Near Maximum !
IMR 7828 SSC 101.7 62.0 4.02 3029 99.6 64150 11436 1.218 ! Near Maximum !
IMR 7828 107.6 62.0 4.02 3029 99.6 64150 11436 1.218 ! Near Maximum !
Alliant Reloder-22 103.3 61.9 4.01 3015 99.9 64150 11320 1.235 ! Near Maximum !
Winchester WXR 106.1 62.2 4.03 3014 99.9 64150 11343 1.235 ! Near Maximum !
Norma MRP 2 110.0 65.2 4.23 3004 99.6 60709 11756 1.264 ! Near Maximum !
Ramshot Magnum 103.0 66.5 4.31 2995 100.0 64150 10754 1.228 ! Near Maximum !
Alliant Reloder-19 100.1 59.4 3.85 2969 99.9 64150 10802 1.234 ! Near Maximum !
Alliant Reloder-23 105.7 61.3 3.97 2968 100.0 64150 10141 1.245 ! Near Maximum !
Alliant Reloder-17 90.8 56.5 3.66 2966 100.0 64150 10054 1.239 ! Near Maximum !
Ramshot Hunter 95.7 58.6 3.80 2956 100.0 64150 10346 1.241 ! Near Maximum !
Winchester 760 90.4 56.7 3.67 2956 100.0 64150 10383 1.242 ! Near Maximum !
Hodgdon H414 90.4 56.7 3.67 2956 100.0 64150 10383 1.242 ! Near Maximum !
Hodgdon H4831 105.4 60.7 3.94 2948 99.1 64150 10739 1.232 ! Near Maximum !
Hodgdon H4831 SC 101.3 60.7 3.94 2948 99.1 64150 10739 1.232 ! Near Maximum !
Norma 204 95.0 58.2 3.77 2945 99.8 64150 10534 1.235 ! Near Maximum !
Hodgdon H1000 110.0 64.5 4.18 2945 99.3 59708 11047 1.255 ! Near Maximum !
Vihtavuori N550 92.5 56.1 3.63 2931 100.0 64150 10033 1.253 ! Near Maximum !
Norma URP 95.2 55.8 3.62 2929 100.0 64150 9894 1.249 ! Near Maximum !
Accurate 4350 94.3 55.9 3.62 2923 100.0 64150 9833 1.267 ! Near Maximum !
Winchester Supreme 780 98.7 61.7 4.00 2922 99.9 64150 10270 1.241 ! Near Maximum !
Vihtavuori N165 105.6 61.9 4.01 2914 100.0 64150 10034 1.245 ! Near Maximum !
Accurate 3100 103.3 61.3 3.97 2912 100.0 64150 9899 1.269 ! Near Maximum !
IMR 4831 99.9 56.7 3.67 2910 100.0 64150 9670 1.258 ! Near Maximum !
Vihtavuori N160 105.7 60.1 3.89 2901 99.4 64150 10133 1.241 ! Near Maximum !
Hodgdon Retumbo 110.0 65.6 4.25 2900 100.0 52068 11408 1.334
IMR 4007 SSC 90.1 54.2 3.51 2883 100.0 64150 9766 1.250 ! Near Maximum !
Hodgdon Hybrid 100V 97.7 56.0 3.63 2880 100.0 64150 9112 1.252 ! Near Maximum !
Vihtavuori 24N41 110.0 69.5 4.50 2838 88.8 55327 11270 1.307 ! Near Maximum !NWBlacktail
Handloader
- Dec 17, 2011
- 357
- 0
I've played with the 168 grain Berger VLD and RL26. I hit pressure up around 2950 fps (24" barrel), but 2925 is fine. 2925 is with 60.0 grains RL26, seated fairly long. Nosler brass, and Fed 215 primers.
NWBlacktail":22ex3f0b said:
Yep RL26 works great for this load and QL is spot on velocity for it.
One thing that has come clear over a couple of years now with RL26 is that it has shot best groups in several calibers with the Magnum primers.
Just shoots better with more fire at ignition regardless of caliber for me.
brikwhitt
Beginner
- Oct 9, 2016
- 129
- 0
Wonder how well it will work for 150 LRAB or the 160 AB
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brikwhitt
Beginner
- Oct 9, 2016
- 129
- 0
In 280 AI of course
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Sent from my SM-N920V using Tapatalk
Charlie-NY
Handloader
- Mar 11, 2005
- 1,418
- 845
An earlier test with RE26 in my 7 WSM produced a surprising 3,200 ft/sec with the 160 AccuBond from a 25" Broughton bbl. Accuracy was good and there was no indication of high pressure.
IIRC I was using 69.0gr and a Fed 215M primer. Below is data from Alliant's web site:
7mm Win. Short Magnum
Sierra 160 gr SBT
Federal 2.79 24 Fed 215 Reloder 23 66.6 3,089 - View this recipe
Federal 2.79 24 Fed 215 Reloder 26 70.5 3,140 - View this recipe
IIRC I was using 69.0gr and a Fed 215M primer. Below is data from Alliant's web site:
7mm Win. Short Magnum
Sierra 160 gr SBT
Federal 2.79 24 Fed 215 Reloder 23 66.6 3,089 - View this recipe
Federal 2.79 24 Fed 215 Reloder 26 70.5 3,140 - View this recipe
