Would someone mind helping me?

[muzz]

I am trying to find information on rl 23 and rl 26 for the 280 AI with 168 Berger vld bullets.
I would be grateful if someone would help me find a safe zone with the 2 powders for these bullets.

Please and thank you

 

[DrMike]

Cartridge          : .280 Ack Imp
Bullet             : .284, 168, Berger VLD G7 #28401
Useable Case Capaci: 64.315 grain H2O = 4.176 cm³
Cartridge O.A.L. L6: 3.330 inch = 84.58 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    49.04   2363    2083   32068   9811     98.6    1.611
-18.0   87    50.27   2421    2186   34346  10025     99.2    1.572
-16.0   89    51.49   2478    2290   36791  10216     99.6    1.531
-14.0   91    52.72   2535    2397   39420  10382     99.9    1.481
-12.0   93    53.94   2591    2504   42246  10523    100.0    1.434
-10.0   95    55.17   2647    2613   45289  10643    100.0    1.389
-08.0   97    56.40   2702    2723   48565  10760    100.0    1.345
-06.0   99    57.62   2756    2833   52062  10873    100.0    1.304
-04.0  101    58.85   2810    2945   55793  10983    100.0    1.264  ! Near Maximum !
-02.0  104    60.07   2863    3058   59792  11090    100.0    1.226  ! Near Maximum !
+00.0  106    61.30   2916    3173   64082  11192    100.0    1.189  ! Near Maximum !
+02.0  108    62.53   2969    3288   68688  11291    100.0    1.153  !DANGEROUS LOAD-DO NOT USE!
+04.0  110    63.75   3022    3406   73638  11386    100.0    1.119  !DANGEROUS LOAD-DO NOT USE!
+06.0  112    64.98   3074    3524   78965  11477    100.0    1.086  !DANGEROUS LOAD-DO NOT USE!
+08.0  114    66.20   3126    3645   84706  11563    100.0    1.055  !DANGEROUS LOAD-DO NOT USE!
+10.0  116    67.43   3178    3767   90901  11644    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    61.30   3011    3383   78222  10811    100.0    1.102  !DANGEROUS LOAD-DO NOT USE!
Data for burning rate decreased by 10% relative to nominal value:
-Ba    106    61.30   2770    2863   50386  11734     99.9    1.308

Cartridge          : .280 Ack Imp
Bullet             : .284, 168, Berger VLD G7 #28401
Useable Case Capaci: 64.315 grain H2O = 4.176 cm³
Cartridge O.A.L. L6: 3.330 inch = 84.58 mm
Barrel Length      : 24.0 inch = 609.6 mm
Powder             : Alliant Reloder-26

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   80    51.12   2382    2117   30839  10746     96.5    1.632
-18.0   82    52.40   2446    2232   33114  11033     97.5    1.588
-16.0   84    53.68   2510    2350   35573  11293     98.4    1.545
-14.0   86    54.95   2573    2470   38230  11525     99.0    1.498
-12.0   88    56.23   2637    2593   41107  11726     99.5    1.447
-10.0   90    57.51   2699    2718   44221  11895     99.9    1.399
-08.0   92    58.79   2762    2845   47600  12029    100.0    1.352
-06.0   94    60.07   2823    2973   51267  12137    100.0    1.307
-04.0   96    61.34   2884    3103   55255  12240    100.0    1.263  ! Near Maximum !
-02.0   98    62.62   2944    3234   59570  12339    100.0    1.222  ! Near Maximum !
+00.0  100    63.90   3004    3367   64218  12433    100.0    1.182  ! Near Maximum !
+02.0  102    65.18   3064    3501   69247  12522    100.0    1.143  !DANGEROUS LOAD-DO NOT USE!
+04.0  104    66.46   3123    3638   74696  12606    100.0    1.106  !DANGEROUS LOAD-DO NOT USE!
+06.0  106    67.73   3182    3776   80610  12684    100.0    1.071  !DANGEROUS LOAD-DO NOT USE!
+08.0  108    69.01   3240    3917   87040  12757    100.0    1.036  !DANGEROUS LOAD-DO NOT USE!
+10.0  110    70.29   3299    4059   94046  12824    100.0    1.003  !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    100    63.90   3123    3637   80530  11927    100.0    1.084  !DANGEROUS LOAD-DO NOT USE!
Data for burning rate decreased by 10% relative to nominal value:
-Ba    100    63.90   2819    2965   49325  13017     99.1    1.315

 

[muzz]

Thank you Dr. Mike ! I really appreciate it. Any one know if a powder will shoot a little faster around the 61 grain area?

 

[DrMike]

Cartridge          : .280 Ack Imp
Bullet             : .284, 168, Berger VLD G7 #28401
Useable Case Capaci: 64.315 grain H2O = 4.176 cm³
Cartridge O.A.L. L6: 3.330 inch = 84.58 mm
Barrel Length      : 24.0 inch = 609.6 mm

Predicted Data for Indicated Charges of the Following Powders.
Matching Maximum Pressure: 64000 psi, or 441 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 !

23 loads produced a Loading Ratio below user-defined minimum of 93%. 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     63.8     4.14    3002   100.0    64000   12428   1.184  ! Near Maximum !
Alliant Reloder-25                 109.2     64.4     4.17    2985   100.0    64000   12107   1.169  ! Near Maximum !
Norma MRP                          101.1     62.6     4.05    2983   100.0    64000   12597   1.180  ! Near Maximum !
Vihtavuori N560                    103.0     62.4     4.04    2983    99.0    64000   13028   1.174  ! Near Maximum !
Accurate MAGPRO                    103.2     65.0     4.22    2975    98.0    64000   13140   1.180  ! Near Maximum !
IMR 7828                           107.5     61.9     4.01    2971    99.3    64000   12592   1.164  ! Near Maximum !
IMR 7828 SSC                       101.7     61.9     4.01    2971    99.3    64000   12592   1.164  ! Near Maximum !
Vihtavuori N570                    110.0     68.8     4.46    2968    95.4    58659   14122   1.212  ! Near Maximum !
Alliant Reloder-22                 103.2     61.9     4.01    2957    99.8    64000   12473   1.180  ! Near Maximum !
Winchester WXR                     106.0     62.2     4.03    2956    99.8    64000   12495   1.181  ! Near Maximum !
Norma MRP 2                        110.0     65.2     4.23    2946    99.3    60693   12939   1.209  ! Near Maximum !
Ramshot Magnum                     103.0     66.5     4.31    2940   100.0    64000   11891   1.173  ! Near Maximum !
Alliant Reloder-23                 105.7     61.3     3.97    2915   100.0    64000   11191   1.189  ! Near Maximum !
Alliant Reloder-19                 100.1     59.3     3.84    2914    99.7    64000   11892   1.179  ! Near Maximum !
Ramshot Hunter                      95.6     58.5     3.79    2902   100.0    64000   11414   1.186  ! Near Maximum !
Alliant Reloder-33                 110.0     70.7     4.58    2892    94.8    54928   13739   1.250
Hodgdon H4831                      105.4     60.7     3.93    2892    98.7    64000   11791   1.176  ! Near Maximum !
Hodgdon H4831 SC                   101.3     60.7     3.93    2892    98.7    64000   11791   1.176  ! Near Maximum !
Norma 204                           95.0     58.1     3.77    2891    99.6    64000   11594   1.179  ! Near Maximum !
Hodgdon H1000                      110.0     64.5     4.18    2889    99.0    59695   12153   1.198  ! Near Maximum !
Norma URP                           95.1     55.8     3.62    2877   100.0    64000   10915   1.193  ! Near Maximum !
Accurate 4350                       94.2     55.9     3.62    2871   100.0    64000   10861   1.210  ! Near Maximum !
Winchester Supreme 780              98.7     61.7     4.00    2868    99.7    64000   11308   1.184  ! Near Maximum !
Vihtavuori N165                    105.5     61.9     4.01    2862    99.9    64000   11075   1.189  ! Near Maximum !
Accurate 3100                      103.3     61.2     3.97    2860   100.0    64000   10939   1.213  ! Near Maximum !
IMR 4831                            99.8     56.7     3.67    2859   100.0    64000   10676   1.202  ! Near Maximum !
Vihtavuori N160                    105.6     60.0     3.89    2848    99.1    64000   11143   1.184  ! Near Maximum !
Hodgdon Hybrid 100V                 97.6     56.0     3.63    2831   100.0    64000   10064   1.195  ! Near Maximum !

 

[muzz]

Again thank you!!

 

[muzz]

Dr. Mike

By having my bullet seated out farther then in the ql you posted does it make much of a difference in pressures by the loads?

 

[DrMike]

You would note an increase in charge before hitting max chamber pressure, but the increased velocity would be marginal, if measurable. How much of an increase in OAL are you envisioning? Remember, the more data you provide the more accurate the QL projection. Measured case volume and measured OAL are critical to accurate measurements.

 

[muzz]

I'll get an oal tonight.