Home Forums Reloading Big Game Rifles 280 AI quick load

I am loading for my .280 Ackley and I would appreciate a run through on quickload just for giggles

1-9 twist, 23" barrel

162 gr ELD-X
Federal 210 Gold
57.0 gr IMR 7828
3.20" OAL

In case anyone was wondering, I bought the rifle on the 'fire and it was 'smithed by
M. Coleman

Dang thing shoots everything good

Thank you,
Burt2506

I'll be standby . . . . as I'm interested as well.

Wonder how RL22, 23, 25 and 26 compare with the 162ELD-X in the 280AI.

A little on the slow side, but if it works thats good. and you’re only burning about 96.4% of the powder charge. The second chart is run up to 62K PSI, SAAMI is 65k psi. The third chart shows you a comparison of better powders if you have any.


Cartridge : .280 Ack Imp
Bullet : .284, 162, Hornady ELD-X 2840 G7
Useable Case Capaci: 61.348 grain H2O = 3.983 cm³
Cartridge O.A.L. L6: 3.200 inch = 81.28 mm
Barrel Length : 23.0 inch = 584.2 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 83 45.60 2181 1711 27091 9059 83.6 1.646
-18.0 85 46.74 2239 1803 28883 9409 85.2 1.603
-16.0 87 47.88 2297 1898 30796 9753 86.7 1.561
-14.0 89 49.02 2356 1997 32843 10090 88.2 1.520
-12.0 91 50.16 2416 2099 35034 10418 89.6 1.480
-10.0 93 51.30 2475 2204 37377 10736 90.9 1.440
-08.0 95 52.44 2536 2313 39889 11043 92.2 1.395
-06.0 98 53.58 2596 2424 42584 11336 93.4 1.352
-04.0 100 54.72 2657 2539 45473 11614 94.5 1.310
-02.0 102 55.86 2718 2657 48581 11876 95.5 1.270
+00.0 104 57.00 2779 2778 51921 12120 96.4 1.231




Cartridge : .280 Ack Imp
Bullet : .284, 162, Hornady ELD-X 2840 G7
Useable Case Capaci: 61.348 grain H2O = 3.983 cm³
Cartridge O.A.L. L6: 3.200 inch = 81.28 mm
Barrel Length : 23.0 inch = 584.2 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 87 48.00 2303 1908 31006 9789 86.9 1.557
-18.0 90 49.20 2365 2013 33177 10143 88.4 1.514
-16.0 92 50.40 2428 2121 35514 10486 89.9 1.472
-14.0 94 51.60 2491 2232 38022 10818 91.3 1.429
-12.0 96 52.80 2555 2348 40719 11137 92.6 1.381
-10.0 98 54.00 2618 2466 43621 11440 93.8 1.337
-08.0 100 55.20 2683 2588 46754 11726 94.9 1.293
-06.0 103 56.40 2747 2714 50133 11994 95.9 1.251
-04.0 105 57.60 2811 2843 53777 12241 96.8 1.211
-02.0 107 58.80 2876 2974 57729 12466 97.6 1.172
+00.0 109 60.00 2940 3109 62006 12667 98.3 1.134


Alliant Reloder-26 101.8 61.9 4.01 2977 100.0 61000 12669 1.157
Norma MRP 102.5 60.5 3.92 2950 99.8 61000 12793 1.155
Vihtavuori N560 104.2 60.2 3.90 2940 97.8 61000 13047 1.151
Alliant Reloder-25 110.0 61.9 4.01 2935 100.0 59759 12295 1.156

Thanks to Ihead71 for runnin the numbers for me

Maybe I can send send an ELDX through a slick head this weekend

Burt2506

Ditto

What kind of speed are you getting and size of groups?

I made a chart to compare 7mm chamberings, holding the pressure at 65 kpsi and comparing distance to equal velocity.

Hornady 7MM .284 DIA 162GR BIG GAME POLY CARB TIP 28452bullets and moly coated them

Comparing cartridge performance at close to optimum powder choice and 65kpsi:
7mmT/CU ........................26.1 gr H335 2330 fps -471 yards
7-30 Waters ........................30 gr W748 2456 fps -395 yards
7mmBR ...........................31.2 gr W748 2510 fps -360 yards
7mm IHMSA .......................40.2 gr Re17 2704 fps -247 yards
7mm-08 .......................40.6 gr IMR4895 2789 fps -198 yards
7mm-08AckleyImproved .........43.6 gr Re15 2833 fps -171 yards
7x57mm ...........................44.6 gr Re15 2843 fps -165 yards
7x57mmAckleyImproved .........46.4 gr Re15 2873 fps -150 yards
284Win .........................50.0 gr IMR4350 2890 fps -172 yards
280Rem ............................53.5 gr H414 2961 fps -152 yards
7mm Rem short action ultra mag 55.5 gr Re17 3015 fps -73 yards
280RemAckleyImproved ........57 gr IMR4350 3019 fps -71 yards
7mmRemMag ......................68.2 gr Re22 3129 fps -15 yards
7mmRem ultra mag ............83.3 gr IMR7828 3130 fps -15 yards
7mmWeathMag ....................71.8 gr Re22 3170 fps +7 yards
7mmSTW .............82.2 gr Ramshot Magnum 3158 fps 0 yards

*The 7mm IHMSA, 7mm-08, 7mm-08AckleyImproved, 7x57mm, 7x57mmAckleyImproved, 280Rem, and 280RemAckleyImproved have 1889Mauser case heads [7.65x53mm parent] with large Boxer primer pocketsand 65,000 psi is a reasonable max pressure for handloads.
*The 7mmBR 1889 Mauser case heads [7.65x53mm parent, 6mmBR parent]with small Boxer primer pockets and could have gone to 80,000 psi:
*The 7mmRemMag, 7mmWeathMag, and 7mmSTW have a 1912 H&H case head[375 H&H parent] and could have gone to 70,000 psi.
*The 7mmTCU has a 1950 Rem case head [.222 Parent] with small Boxerprimer and could have gone to 75,000 psi
*7x30 Waters has a Winchester 1895 case head [ 30-30 parent] and couldhave gone to 70,000 psi.
*The 284 has a Winchester 1954 case head [284 parent], and possiblyshould not go more than 54,000 psi.
Last edited by Clark; 11-03-2013, 06:17 PM.

Crankemup,
I do not have a chronograph, so I am unsure of the velocity....as far as groups go, the stupid gun just shoots everything very well. And by well, I mean freaking awesome. Even with me on the trigger, I got sub 1" groups with both the 150 gr NBT & IMR 4451 and the 162 ELDX & IMR 7828.

I have field tested the ELDX on a southern whitetail and have no complaints with a sample of one.

I realize that the powder charge has room to increase, and I will lean on it, but if the accuracy drops off even a gnats arse, I go back to the 57 grains.

Burt2506

Give RL23 a try I had great speed and accuracy using the 162 eld-xs out of a 24" Tube. RL26 speed was on par with RL23 but I couldn't get rid of a flyer with 26.