QL 280AI 168ABLR 7828SSC
- Thread starter nvbroncrider
- Start date
- Nov 4, 2004
- 25,584
- 9,713
I shot the 168 gr ABLR's with IMR7828SSC.
59.0 grs went .608", velocity was 2841, 2819 and 2819 but I had flattened primers.
JD338
59.0 grs went .608", velocity was 2841, 2819 and 2819 but I had flattened primers.
JD338
In my .280, with R22 of course, it didn't like 7828, I got 2750fps and .5" with the 168 ABLR at .030 off the lands. Now, the 150 ABLR is about .080 to get there for 2880! This is my first time to try any kind of VLD bullet, so I'm happy. Even at just 2750 at +1@100 it was spot on at 200! I'm going to see if I can get it at 3000 or more in this 26" 7mm Rem Mag. ( I couldn't justify a .280 AI with this ,280 shooting that well! ha) You guys seem to know how to get the diesel hot in those 280 AIs! ha
Ridgerunner665
Handloader
- Oct 28, 2008
- 2,516
- 299
How flat?JD338":2iylo2nt said:
Reason I ask is that according to QuickLoad your velocity is about right... It says the pressure of that load is only about 55k psi.
Just saying it might be worth a try to redo that one and see if it repeats.
Not trying to get you to blow yourself up or anything... But the node should be there at about 59.5 grains...
Code:
Cartridge : .280 Ack Imp
Bullet : .284, 168, Nosler Accubond LR 58623 G7
Useable Case Capaci: 63.790 grain H2O = 4.142 cm³
Cartridge O.A.L. L6: 3.330 inch = 84.58 mm
Barrel Length : 24.0 inch = 609.6 mm
Powder : IMR 7828 SSC
Predicted data by increasing and decreasing the given charge,
incremented in steps of 0.833% 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
-08.3 91 55.00 2633 2586 44091 11346 95.4 1.384
-07.5 92 55.50 2658 2636 45337 11455 95.8 1.366
-06.7 93 56.00 2684 2687 46622 11560 96.2 1.348
-05.8 94 56.50 2709 2738 47946 11662 96.6 1.330
-05.0 94 57.00 2735 2790 49311 11761 96.9 1.313
-04.2 95 57.50 2760 2842 50716 11857 97.3 1.296
-03.3 96 58.00 2786 2895 52162 11949 97.6 1.279
-02.5 97 58.50 2811 2948 53662 12037 97.9 1.262
-01.7 98 59.00 2837 3002 55205 12122 98.1 1.246
-00.8 99 59.50 2862 3056 56798 12202 98.4 1.230 ! Near Maximum !
+00.0 99 60.00 2888 3111 58440 12279 98.6 1.214 ! Near Maximum !
+00.8 100 60.50 2913 3166 60137 12352 98.9 1.198 ! Near Maximum !
+01.7 101 61.00 2938 3221 61886 12421 99.1 1.182 ! Near Maximum !
+02.5 102 61.50 2964 3277 63692 12485 99.2 1.167 ! Near Maximum !
+03.3 103 62.00 2989 3333 65560 12545 99.4 1.152 !DANGEROUS LOAD-DO NOT USE!
+04.2 103 62.50 3014 3390 67492 12601 99.5 1.137 !DANGEROUS LOAD-DO NOT USE!Sometimes underpressure loads will exhibit some flattened primers because the case didn't actually blow out enough to grab the chamber walls. Not always, and I wouldn't suggest pushing if your seeing serious signs, but sometimes underpressure with the slow powders is worse than overloading to some extent.
Great thought RR. I saw the same thing when I ran Jim's profile. Plus Jim has a long chamber and the ability to run those bullets out long.
Great thought RR. I saw the same thing when I ran Jim's profile. Plus Jim has a long chamber and the ability to run those bullets out long.
- Thread starter
- #27
nvbroncrider
Handloader
- Aug 20, 2011
- 3,085
- 4
I ran up to 61.5 with no pressure yet I'm close not gonna push it anymore, and I have a long chamber. He might be closer than you think since his isn't SAMMI but I think he's got some room. I don't know what the .014" change in headspace does for capacity or pressure.
Ridgerunner665
Handloader
- Oct 28, 2008
- 2,516
- 299
nvbroncrider":1kifvkjc said:
Not enough to notice...
Throat length though will make some difference.
