280 Ackley Quickload Request

[wildbill141]

Hello gents

Hoping someone would be willing to run a couple sets in QL for me to help fine tune my loads. Been working on the first gun a while now and starting to get frustrated.

The first rifle is a Cooper Excaliber with 1:9 twist and 24" bbl. Shoots the loads below pretty well but not exceptional. Need to tweak just a bit and hoping QL is the ticket.
Assume new Nosler brass.

Load 1: 168 ABLR 58.0 grn Reloader 23 Fed 215M 3.350" max not chrono'd
Load 2: 168 ABLR 57.8 H4831sc BR-2 3.34" 2840 fps
Load 3: 145 LRX 59.5 RL23 Fed215M 3.50" 3040 fps
Load 4: 175 ABLR 60.5 Retumbo Fed 215M 3.34" 2790 fps

The second rifle is Kimber with 23" bbl. This rifle shoots both loads pretty well. Just trying to confirm OBT.

Load 1: 145 LRX 59.5 H4831sc Fed 215M 3.34" 3025 fps
Load 2: 168 ABLR 57.0 H4831sc Fed 210 3.20" 2820 fps

Any comments also welcome.

Thanks in advance

 

[DrMike]

QL shows that you have some room to increase charge on these loads if you so desire.

Cartridge : .280 Ack Imp
Bullet : .284, 168, Nosler AccuBond LR 58623 G7
Useable Case Capaci: 63.834 grain H2O = 4.145 cm³
Cartridge O.A.L. L6: 3.350 inch = 85.09 mm
Barrel Length : 24.0 inch = 609.6 mm
Powder : Alliant Reloder-23

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 85 48.80 2360 2078 32010 9754 98.5 1.614
-18.0 87 50.02 2418 2181 34284 9968 99.1 1.572
-16.0 89 51.24 2475 2285 36727 10159 99.6 1.531
-14.0 91 52.46 2532 2391 39352 10325 99.9 1.481
-12.0 93 53.68 2588 2499 42176 10466 100.0 1.434
-10.0 95 54.90 2644 2608 45216 10586 100.0 1.389
-08.0 97 56.12 2699 2717 48491 10701 100.0 1.346
-06.0 100 57.34 2754 2828 51998 10813 100.0 1.304
-04.0 102 58.56 2807 2940 55738 10922 100.0 1.264 ! Near Maximum !
-02.0 104 59.78 2861 3053 59746 11027 100.0 1.226 ! Near Maximum !
+00.0 106 61.00 2914 3168 64047 11128 100.0 1.189 ! Near Maximum !
+02.0 108 62.22 2967 3283 68667 11226 100.0 1.153 !DANGEROUS LOAD-DO NOT USE!
+04.0 110 63.44 3019 3401 73635 11319 100.0 1.119 !DANGEROUS LOAD-DO NOT USE!
+06.0 112 64.66 3072 3520 78983 11408 100.0 1.086 !DANGEROUS LOAD-DO NOT USE!
+08.0 114 65.88 3124 3640 84749 11493 100.0 1.054 !DANGEROUS LOAD-DO NOT USE!
+10.0 117 67.10 3176 3762 90976 11573 100.0 1.024 !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 106 61.00 3009 3378 78239 10746 100.0 1.102 !DANGEROUS LOAD-DO NOT USE!
Data for burning rate decreased by 10% relative to nominal value:
-Ba 106 61.00 2768 2857 50348 11668 99.9 1.308

Cartridge : .280 Ack Imp
Bullet : .284, 168, Nosler AccuBond LR 58623 G7
Useable Case Capaci: 63.834 grain H2O = 4.145 cm³
Cartridge O.A.L. L6: 3.350 inch = 85.09 mm
Barrel Length : 24.0 inch = 609.6 mm
Powder : Hodgdon H4831 SC

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 78 46.24 2202 1808 29125 8693 87.0 1.668
-18.0 80 47.40 2257 1900 31044 8992 88.3 1.627
-16.0 82 48.55 2312 1995 33084 9286 89.6 1.586
-14.0 84 49.71 2368 2092 35260 9573 90.8 1.547
-12.0 86 50.86 2424 2192 37584 9852 92.0 1.507
-10.0 87 52.02 2480 2295 40064 10123 93.1 1.459
-08.0 89 53.18 2536 2400 42714 10383 94.1 1.416
-06.0 91 54.33 2593 2508 45552 10632 95.0 1.374
-04.0 93 55.49 2649 2618 48586 10870 95.9 1.333
-02.0 95 56.64 2706 2731 51838 11094 96.7 1.294
+00.0 97 57.80 2762 2846 55323 11304 97.4 1.256 ! Near Maximum !
+02.0 99 58.96 2819 2964 59038 11498 98.0 1.220 ! Near Maximum !
+04.0 101 60.11 2875 3084 63007 11677 98.5 1.184 ! Near Maximum !
+06.0 103 61.27 2932 3206 67267 11838 99.0 1.150 !DANGEROUS LOAD-DO NOT USE!
+08.0 105 62.42 2988 3330 71844 11980 99.4 1.117 !DANGEROUS LOAD-DO NOT USE!
+10.0 107 63.58 3044 3457 76768 12104 99.7 1.085 !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 97 57.80 2895 3127 65939 11217 99.9 1.165 !DANGEROUS LOAD-DO NOT USE!
Data for burning rate decreased by 10% relative to nominal value:
-Ba 97 57.80 2587 2497 45219 10830 90.8 1.374

Cartridge : .280 Ack Imp
Bullet : .284, 145, Barnes 'LRX'BT 28404
Useable Case Capaci: 64.449 grain H2O = 4.185 cm³
Cartridge O.A.L. L6: 3.350 inch = 85.09 mm
Barrel Length : 24.0 inch = 609.6 mm
Powder : Alliant Reloder-23

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 50.72 2508 2026 31881 9819 96.7 1.491
-18.0 89 51.99 2571 2129 34112 10071 97.7 1.452
-16.0 92 53.26 2634 2234 36513 10301 98.4 1.415
-14.0 94 54.52 2697 2342 39097 10508 99.0 1.379
-12.0 96 55.79 2760 2452 41882 10691 99.5 1.343
-10.0 98 57.06 2822 2564 44888 10848 99.8 1.308
-08.0 100 58.33 2883 2677 48133 10978 100.0 1.265
-06.0 103 59.60 2945 2792 51641 11082 100.0 1.225
-04.0 105 60.86 3005 2908 55436 11179 100.0 1.186 ! Near Maximum !
-02.0 107 62.13 3065 3025 59549 11273 100.0 1.149 ! Near Maximum !
+00.0 109 63.40 3124 3143 64000 11362 100.0 1.113 ! Near Maximum !
+02.0 111 64.67 3184 3263 68784 11448 100.0 1.079 !DANGEROUS LOAD-DO NOT USE!
+04.0 113 65.94 3242 3385 73951 11528 100.0 1.046 !DANGEROUS LOAD-DO NOT USE!
+06.0 116 67.20 3301 3508 79547 11604 100.0 1.014 !DANGEROUS LOAD-DO NOT USE!
+08.0 118 68.47 3359 3633 85616 11675 100.0 0.983 !DANGEROUS LOAD-DO NOT USE!
+10.0 120 69.74 3417 3760 92212 11740 100.0 0.953 !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 63.40 3238 3375 78654 10939 100.0 1.029 !DANGEROUS LOAD-DO NOT USE!
Data for burning rate decreased by 10% relative to nominal value:
-Ba 109 63.40 2949 2801 50497 11835 99.1 1.227


Retumbo may not be the best powder with the 175 grain ABLR. I do understand, however, working with what one has available.

Cartridge : .280 Ack Imp
Bullet : .284, 175, Nosler AccuBond LR 58517 G7
Useable Case Capaci: 63.428 grain H2O = 4.118 cm³
Cartridge O.A.L. L6: 3.350 inch = 85.09 mm
Barrel Length : 24.0 inch = 609.6 mm
Powder : Hodgdon Retumbo

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 93 54.40 2301 2057 30487 10594 93.5 1.654
-18.0 95 55.76 2367 2177 32747 10943 95.0 1.607
-16.0 97 57.12 2433 2301 35192 11264 96.3 1.562
-14.0 99 58.48 2500 2429 37844 11555 97.4 1.513
-12.0 102 59.84 2567 2561 40718 11813 98.3 1.460
-10.0 104 61.20 2634 2696 43839 12034 99.1 1.409
-08.0 106 62.56 2701 2835 47233 12216 99.6 1.360
-06.0 109 63.92 2767 2976 50932 12358 99.9 1.312
-04.0 111 65.28 2833 3120 54970 12456 100.0 1.266
-02.0 113 66.64 2899 3265 59384 12531 100.0 1.222 ! Near Maximum !
+00.0 116 68.00 2964 3413 64222 12600 100.0 1.179 ! Near Maximum !
+02.0 118 69.36 3028 3563 69541 12663 100.0 1.138 !DANGEROUS LOAD-DO NOT USE!
+04.0 120 70.72 3092 3716 75397 12720 100.0 1.098 !DANGEROUS LOAD-DO NOT USE!
+06.0 123 72.08 3156 3871 81867 12770 100.0 1.060 !DANGEROUS LOAD-DO NOT USE!
+08.0 125 73.44 3220 4030 89033 12812 100.0 1.023 !DANGEROUS LOAD-DO NOT USE!
+10.0 127 74.80 3284 4192 97012 12846 100.0 0.987 !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 116 68.00 3095 3721 80206 12019 100.0 1.082 !DANGEROUS LOAD-DO NOT USE!
Data for burning rate decreased by 10% relative to nominal value:
-Ba 116 68.00 2758 2957 50999 13038 97.8 1.308


Cartridge : .280 Ack Imp
Bullet : .284, 145, Barnes 'LRX'BT 28404
Useable Case Capaci: 64.449 grain H2O = 4.185 cm³
Cartridge O.A.L. L6: 3.350 inch = 85.09 mm
Barrel Length : 23.0 inch = 584.2 mm
Powder : Hodgdon H4831 SC

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 50.00 2402 1858 32430 9440 85.6 1.446
-18.0 85 51.25 2464 1955 34641 9773 87.0 1.408
-16.0 87 52.50 2527 2055 37014 10099 88.3 1.372
-14.0 89 53.75 2590 2159 39561 10418 89.7 1.336
-12.0 92 55.00 2653 2266 42296 10728 90.9 1.301
-10.0 94 56.25 2717 2376 45238 11027 92.1 1.266
-08.0 96 57.50 2781 2489 48407 11315 93.2 1.226
-06.0 98 58.75 2845 2606 51821 11590 94.3 1.187
-04.0 100 60.00 2910 2726 55506 11851 95.2 1.150 ! Near Maximum !
-02.0 102 61.25 2975 2849 59488 12095 96.1 1.114 ! Near Maximum !
+00.0 104 62.50 3040 2975 63798 12323 96.9 1.079 ! Near Maximum !
+02.0 106 63.75 3105 3105 68470 12531 97.6 1.045 !DANGEROUS LOAD-DO NOT USE!
+04.0 108 65.00 3171 3237 73529 12719 98.3 1.013 !DANGEROUS LOAD-DO NOT USE!
+06.0 110 66.25 3236 3373 78995 12884 98.8 0.981 !DANGEROUS LOAD-DO NOT USE!
+08.0 112 67.50 3302 3511 84940 13027 99.2 0.951 !DANGEROUS LOAD-DO NOT USE!
+10.0 114 68.75 3368 3653 91422 13145 99.6 0.921 !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 104 62.50 3190 3276 76203 12279 99.9 1.001 !DANGEROUS LOAD-DO NOT USE!
Data for burning rate decreased by 10% relative to nominal value:
-Ba 104 62.50 2844 2605 52210 11760 90.0 1.180

Cartridge : .280 Ack Imp
Bullet : .284, 168, Nosler AccuBond LR 58623 G7
Useable Case Capaci: 63.841 grain H2O = 4.145 cm³
Cartridge O.A.L. L6: 3.350 inch = 85.09 mm
Barrel Length : 23.0 inch = 584.2 mm
Powder : Hodgdon H4831 SC

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 81 48.32 2273 1927 32659 9628 88.8 1.558
-18.0 83 49.53 2331 2026 34907 9949 90.1 1.517
-16.0 85 50.74 2389 2129 37313 10262 91.3 1.477
-14.0 87 51.94 2447 2234 39889 10566 92.5 1.429
-12.0 89 53.15 2506 2343 42652 10858 93.6 1.384
-10.0 91 54.36 2565 2454 45613 11139 94.6 1.341
-08.0 93 55.57 2624 2568 48796 11406 95.5 1.299
-06.0 95 56.78 2683 2685 52213 11658 96.4 1.259
-04.0 97 57.98 2742 2804 55887 11894 97.2 1.220 ! Near Maximum !
-02.0 100 59.19 2801 2926 59813 12114 97.8 1.183 ! Near Maximum !
+00.0 102 60.40 2860 3051 64026 12314 98.4 1.147 ! Near Maximum !
+02.0 104 61.61 2919 3179 68562 12495 98.9 1.112 !DANGEROUS LOAD-DO NOT USE!
+04.0 106 62.82 2978 3309 73455 12655 99.3 1.078 !DANGEROUS LOAD-DO NOT USE!
+06.0 108 64.02 3037 3441 78739 12792 99.7 1.046 !DANGEROUS LOAD-DO NOT USE!
+08.0 110 65.23 3096 3576 84456 12906 99.9 1.014 !DANGEROUS LOAD-DO NOT USE!
+10.0 112 66.44 3155 3713 90652 12995 100.0 0.984 !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 102 60.40 2988 3330 76236 12057 100.0 1.065 !DANGEROUS LOAD-DO NOT USE!
Data for burning rate decreased by 10% relative to nominal value:
-Ba 102 60.40 2687 2692 52236 11950 92.7 1.253

And, welcome aboard. Fine cartridge you're loading for, and a couple of fine rifles. When you get a chance, give us a picture of your rifles.

 

[wildbill141]

Thanks Mike!

 

[JD338]

Welcome to the forum.

IMR7828SSC worked very well with the 168 gr ABLR in my 280AI.

JD338

 

[SJB358]

Welcome aboard. Sounds like a great set of rifles.

 

[longrangehunter]

Welcome to the forum Bill- JD's load uses the same powder and charge as mine, but I'm using the 175 Partition. Which has work really well for me over the past 15 years in my 280 AI.

 

[wildbill141]

Thanks again guys. I'll give a full report when I am done with these loads. I have a lot of rounds down range so there should be some significance to the data.

 

[wildbill141]

Hello gents!

Here's where I ended with the Cooper. All shoot 1/2-3/4" @100 yds and 1.5-2" @300 yrds.

145 LRX
59.5 RL23
Fed 215
3120 fps

168 ABLR
58.0 RL23
Fed 215 or 210 (1/2" better @300 yrd with Fed 215s)
2912 fps
not sure why this shoots-its in the middle of the node

175 ABLR
63.2 Retumbo
Fed 215
2885 fps

 

[DrMike]

Those are excellent velocities; and you obviously are getting great accuracy. That has to be gratifying. Congratulations.

 

[NWBlacktail]

WOW, that is great speed for the 175. It's a pretty compressed load (guessing your not using Redding Comp seating dies :mrgreen: ). But with that high BC, those things would sail.

The 168 looks like a pretty awesome load as well.

 

[SJB358]

Very nice loads, and that rifle looks AWESOME to boot!

Great combo right there! Great shooting. Speeds look excellent for the 168 and 175's as well.

 

[JD338]

Those are some good speeds that you are getting. I will give RL23 a try with the 168 gr ABLR.

JD338

 

[wildbill141]

Took a while to get here. I spent hours studying the loads you all developed as I worked up my loads. The icing on the cake was the Quickload data from DrMike.

Thanks again guys :grin: :grin: :grin: :grin: :grin: :grin: :grin: :grin:

 

[sask boy]

Welcome aboard Bill, I know you are going to enjoy this forum lots of knowledge along with great people.
That 280AI of yours is a great looking rifle.

Blessings,
Dan

 

[snoodcrusher]

Great looking rifle !


Sent from my iPhone using Tapatalk

 

[wildbill141]

Would someone please run the following in QL? Looking for the node.

23" bbl
New brass
fed 215 primers

Load 1: 175 ABLR w/ retumbo. I get 2840 fps w/ 63.1 grn
Load 2: 175 ABLR w/ RL 23. I get 2740 w/ 57 grn
Load 3: 160 AB w/ RL 23. I get 2845 w/ 58.5 grn.

Thanks in advance

 

[DrMike]

Cartridge : .280 Ack Imp
Bullet : .284, 175, Nosler AccuBond LR 58517 G7
Useable Case Capaci: 63.113 grain H2O = 4.098 cm³
Cartridge O.A.L. L6: 3.330 inch = 84.58 mm
Barrel Length : 23.0 inch = 584.2 mm
Powder : Hodgdon Retumbo

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 50.48 2089 1696 25059 9843 87.5 1.750
-18.0 88 51.74 2149 1794 26756 10247 89.4 1.705
-16.0 91 53.00 2209 1896 28578 10636 91.1 1.660
-14.0 93 54.27 2270 2001 30535 11008 92.7 1.617
-12.0 95 55.53 2331 2111 32638 11361 94.2 1.574
-10.0 97 56.79 2393 2225 34904 11689 95.5 1.532
-08.0 99 58.05 2455 2342 37344 11992 96.7 1.489
-06.0 101 59.31 2517 2463 39976 12266 97.7 1.440
-04.0 104 60.58 2580 2586 42817 12509 98.5 1.393
-02.0 106 61.84 2642 2713 45889 12718 99.2 1.347
+00.0 108 63.10 2705 2843 49213 12890 99.6 1.303
+02.0 110 64.36 2767 2974 52819 13025 99.9 1.260
+04.0 112 65.62 2828 3109 56736 13120 100.0 1.219 ! Near Maximum !
+06.0 114 66.89 2890 3245 60998 13192 100.0 1.178 ! Near Maximum !
+08.0 116 68.15 2951 3383 65642 13259 100.0 1.140 !DANGEROUS LOAD-DO NOT USE!
+10.0 119 69.41 3011 3523 70717 13320 100.0 1.102 !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 108 63.10 2859 3176 60905 12307 100.0 1.189 ! Near Maximum !
Data for burning rate decreased by 10% relative to nominal value:
-Ba 108 63.10 2480 2390 39444 12486 92.7 1.449


(Severely compressed load)

Cartridge : .280 Ack Imp
Bullet : .284, 175, Nosler AccuBond LR 58517 G7
Useable Case Capaci: 63.113 grain H2O = 4.098 cm³
Cartridge O.A.L. L6: 3.330 inch = 84.58 mm
Barrel Length : 23.0 inch = 584.2 mm
Powder : Hodgdon Retumbo

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 92 53.60 2237 1945 29484 10814 91.9 1.640
-18.0 94 54.94 2302 2060 31638 11199 93.5 1.594
-16.0 96 56.28 2368 2178 33969 11560 95.0 1.549
-14.0 98 57.62 2434 2301 36489 11892 96.3 1.505
-12.0 101 58.96 2500 2428 39218 12193 97.4 1.454
-10.0 103 60.30 2566 2559 42175 12459 98.4 1.403
-08.0 105 61.64 2633 2693 45390 12687 99.1 1.354
-06.0 108 62.98 2699 2830 48885 12876 99.6 1.307
-04.0 110 64.32 2765 2970 52694 13021 99.9 1.261
-02.0 112 65.66 2830 3113 56852 13122 100.0 1.217 ! Near Maximum !
+00.0 115 67.00 2895 3257 61399 13198 100.0 1.175 ! Near Maximum !
+02.0 117 68.34 2960 3404 66386 13268 100.0 1.134 !DANGEROUS LOAD-DO NOT USE!
+04.0 119 69.68 3024 3553 71864 13332 100.0 1.094 !DANGEROUS LOAD-DO NOT USE!
+06.0 121 71.02 3088 3705 77901 13389 100.0 1.056 !DANGEROUS LOAD-DO NOT USE!
+08.0 124 72.36 3152 3860 84575 13438 100.0 1.019 !DANGEROUS LOAD-DO NOT USE!
+10.0 126 73.70 3215 4018 91973 13479 100.0 0.983 !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 115 67.00 3032 3573 76553 12578 100.0 1.076 !DANGEROUS LOAD-DO NOT USE!
Data for burning rate decreased by 10% relative to nominal value:
-Ba 115 67.00 2683 2797 48836 13456 96.7 1.305

Cartridge : .280 Ack Imp
Bullet : .284, 175, Nosler AccuBond LR 58517 G7
Useable Case Capaci: 63.113 grain H2O = 4.098 cm³
Cartridge O.A.L. L6: 3.330 inch = 84.58 mm
Barrel Length : 23.0 inch = 584.2 mm
Powder : Alliant Reloder-23

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 84 47.84 2285 2029 32047 10083 98.6 1.606
-18.0 86 49.04 2341 2129 34309 10306 99.1 1.564
-16.0 88 50.23 2396 2231 36738 10507 99.6 1.524
-14.0 90 51.43 2451 2334 39347 10683 99.9 1.475
-12.0 92 52.62 2506 2439 42151 10833 100.0 1.429
-10.0 95 53.82 2560 2546 45167 10961 100.0 1.384
-08.0 97 55.02 2613 2653 48405 11086 100.0 1.341
-06.0 99 56.21 2666 2761 51852 11206 100.0 1.300
-04.0 101 57.41 2718 2871 55531 11324 100.0 1.260 ! Near Maximum !
-02.0 103 58.60 2770 2981 59472 11438 100.0 1.222 ! Near Maximum !
+00.0 105 59.80 2821 3093 63694 11548 100.0 1.185 ! Near Maximum !
+02.0 107 61.00 2872 3206 68224 11655 100.0 1.150 !DANGEROUS LOAD-DO NOT USE!
+04.0 109 62.19 2923 3321 73087 11757 100.0 1.116 !DANGEROUS LOAD-DO NOT USE!
+06.0 111 63.39 2974 3437 78315 11855 100.0 1.083 !DANGEROUS LOAD-DO NOT USE!
+08.0 113 64.58 3025 3555 83942 11949 100.0 1.052 !DANGEROUS LOAD-DO NOT USE!
+10.0 116 65.78 3075 3675 90009 12037 100.0 1.021 !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 105 59.80 2914 3299 77673 11158 100.0 1.098 !DANGEROUS LOAD-DO NOT USE!
Data for burning rate decreased by 10% relative to nominal value:
-Ba 105 59.80 2679 2789 50109 12098 99.9 1.305

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 : 23.0 inch = 584.2 mm
Powder : Alliant Reloder-23

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 2375 2003 31649 10306 97.5 1.549
-18.0 88 50.84 2434 2105 33907 10559 98.3 1.508
-16.0 90 52.08 2494 2210 36333 10789 99.0 1.469
-14.0 92 53.32 2553 2316 38944 10993 99.5 1.422
-12.0 94 54.56 2612 2424 41754 11172 99.8 1.376
-10.0 96 55.80 2670 2534 44781 11323 100.0 1.332
-08.0 98 57.04 2728 2644 48044 11447 100.0 1.289
-06.0 101 58.28 2785 2756 51566 11563 100.0 1.249
-04.0 103 59.52 2842 2870 55348 11675 100.0 1.210 ! Near Maximum !
-02.0 105 60.76 2898 2984 59391 11783 100.0 1.172 ! Near Maximum !
+00.0 107 62.00 2954 3100 63735 11888 100.0 1.136 ! Near Maximum !
+02.0 109 63.24 3009 3217 68408 11988 100.0 1.101 !DANGEROUS LOAD-DO NOT USE!
+04.0 111 64.48 3064 3335 73442 12084 100.0 1.068 !DANGEROUS LOAD-DO NOT USE!
+06.0 113 65.72 3119 3456 78871 12176 100.0 1.035 !DANGEROUS LOAD-DO NOT USE!
+08.0 115 66.96 3173 3578 84735 12262 100.0 1.004 !DANGEROUS LOAD-DO NOT USE!
+10.0 118 68.20 3228 3701 91079 12343 100.0 0.974 !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 3057 3321 78085 11468 100.0 1.050 !DANGEROUS LOAD-DO NOT USE!
Data for burning rate decreased by 10% relative to nominal value:
-Ba 107 62.00 2794 2774 50071 12420 99.5 1.253

 

[wildbill141]

Thank you sir