That's a great load for sure. I just got a new 8lb jug of RL23 that's a different lot than my previous batch. When I test this lot, I might work up to pressure and see where I'm at. My primers are just as round at 54.2gr as they were at 52.5gr where I started. This load shoots so well though and has a decent ES of 20 and SD of 7.
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280 AI Retumbo
- Thread starter Butte Sink
- Start date
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Butte Sink
Member
OK 23 is on order 
Butte Sink
Member
OK let me get your thoughts
Tell me with QL data where would you be comfortable starting—
I'm thinking around 58 and going up
Cartridge : .280 Ack Imp
Bullet : .284, 160, Nosler AccuBond 54932
Useable Case Capaci: 64.303 grain H2O = 4.175 cm³
Cartridge O.A.L. L6: 3.330 inch = 84.58 mm
Barrel Length : 24.0 inch = 609.6 mm
Powder : Alliant Reloder-23
Code:
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 86 49.60 2405 2055 31649 9842 97.9 1.586
-18.0 88 50.84 2465 2159 33906 10072 98.6 1.543
-16.0 90 52.08 2525 2264 36333 10279 99.2 1.501
-14.0 92 53.32 2584 2372 38944 10462 99.6 1.454
-12.0 94 54.56 2642 2481 41753 10620 99.9 1.407
-10.0 96 55.80 2701 2591 44781 10751 100.0 1.363
-08.0 98 57.04 2758 2702 48043 10863 100.0 1.320
-06.0 101 58.28 2815 2815 51566 10972 100.0 1.278
-04.0 103 59.52 2871 2929 55348 11077 100.0 1.239 ! Near Maximum !
-02.0 105 60.76 2927 3044 59391 11179 100.0 1.201 ! Near Maximum !
+00.0 107 62.00 2982 3160 63735 11277 100.0 1.164 ! Near Maximum !
+02.0 109 63.24 3037 3277 68408 11371 100.0 1.129 !DANGEROUS LOAD-DO NOT USE!
+04.0 111 64.48 3092 3397 73442 11460 100.0 1.094 !DANGEROUS LOAD-DO NOT USE!
+06.0 113 65.72 3146 3517 78871 11546 100.0 1.062 !DANGEROUS LOAD-DO NOT USE!
+08.0 115 66.96 3201 3640 84735 11626 100.0 1.030 !DANGEROUS LOAD-DO NOT USE!
+10.0 118 68.20 3255 3764 91079 11702 100.0 1.000 !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 107 62.00 3084 3379 78085 10879 100.0 1.077 !DANGEROUS LOAD-DO NOT USE!
Data for burning rate decreased by 10% relative to nominal value:
-Ba 107 62.00 2826 2837 50072 11808 99.7 1.282
Tell me with QL data where would you be comfortable starting—
I'm thinking around 58 and going up
Cartridge : .280 Ack Imp
Bullet : .284, 160, Nosler AccuBond 54932
Useable Case Capaci: 64.303 grain H2O = 4.175 cm³
Cartridge O.A.L. L6: 3.330 inch = 84.58 mm
Barrel Length : 24.0 inch = 609.6 mm
Powder : Alliant Reloder-23
Code:
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 86 49.60 2405 2055 31649 9842 97.9 1.586
-18.0 88 50.84 2465 2159 33906 10072 98.6 1.543
-16.0 90 52.08 2525 2264 36333 10279 99.2 1.501
-14.0 92 53.32 2584 2372 38944 10462 99.6 1.454
-12.0 94 54.56 2642 2481 41753 10620 99.9 1.407
-10.0 96 55.80 2701 2591 44781 10751 100.0 1.363
-08.0 98 57.04 2758 2702 48043 10863 100.0 1.320
-06.0 101 58.28 2815 2815 51566 10972 100.0 1.278
-04.0 103 59.52 2871 2929 55348 11077 100.0 1.239 ! Near Maximum !
-02.0 105 60.76 2927 3044 59391 11179 100.0 1.201 ! Near Maximum !
+00.0 107 62.00 2982 3160 63735 11277 100.0 1.164 ! Near Maximum !
+02.0 109 63.24 3037 3277 68408 11371 100.0 1.129 !DANGEROUS LOAD-DO NOT USE!
+04.0 111 64.48 3092 3397 73442 11460 100.0 1.094 !DANGEROUS LOAD-DO NOT USE!
+06.0 113 65.72 3146 3517 78871 11546 100.0 1.062 !DANGEROUS LOAD-DO NOT USE!
+08.0 115 66.96 3201 3640 84735 11626 100.0 1.030 !DANGEROUS LOAD-DO NOT USE!
+10.0 118 68.20 3255 3764 91079 11702 100.0 1.000 !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 107 62.00 3084 3379 78085 10879 100.0 1.077 !DANGEROUS LOAD-DO NOT USE!
Data for burning rate decreased by 10% relative to nominal value:
-Ba 107 62.00 2826 2837 50072 11808 99.7 1.282
talltexanrancher
Well-Known Member
I like/use Hodgdon 1000. Very consistent performance for me.
