260 Ackley Improved

Mtnguy78

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What does everyone recommend for powder choices for the 260AI ?

I plan on shooting 140+ projectiles. 147s, 143s, 142s, 140 Hybrids or something to that effect.

I was thinking of H4831sc ? Or maybe some Vihtavouri powder of some flavour?

Let me know

Cheers
 
Haven't loaded for that cartridge but i would be looking at the slower burning powders. Haven't used any Vihtavouri powders yet. I load a 6.5x55 with 140grbullets, which you should be getting closer to in case capacity, use H54831 and H4350.
 
note the OAL is 2.93" OAL

Code:
Cartridge          : .260 Ackley
Bullet             : .264, 143, Hornady ELD-X 2635 G7
Useable Case Capaci: 49.450 grain H2O = 3.211 cm³
Cartridge O.A.L. L6: 2.930 inch = 74.42 mm
Barrel Length      : 24.0 inch = 609.6 mm

Predicted Data for Indicated Charges of the Following Powders.
Matching Maximum Pressure: 62000 psi, or 427 MPa
or a maximum loading ratio or filling of 104 %
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 !

118 loads produced a Loading Ratio below user-defined minimum of 80%. 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                  99.0     48.5     3.14    2917   100.0    62000   11004   1.160  ! Near Maximum !
Norma MRP                           99.9     47.5     3.08    2884    99.7    62000   11154   1.165  ! Near Maximum !
Vihtavuori N560                    101.7     47.4     3.07    2870    97.5    62000   11379   1.164  ! Near Maximum !
IMR 7828 SSC                       100.5     47.0     3.05    2858    97.9    62000   11013   1.157  ! Near Maximum !
Accurate MAGPRO                    101.9     49.4     3.20    2856    96.0    62000   11423   1.169  ! Near Maximum !
Alliant Reloder-22                 101.8     46.9     3.04    2847    98.9    62000   10965   1.172  ! Near Maximum !
Ramshot Magnum                     101.9     50.6     3.28    2836    99.3    62000   10532   1.161  ! Near Maximum !
Alliant Reloder-17                  89.3     42.7     2.77    2829   100.0    62000    9748   1.176  ! Near Maximum !
Alliant Reloder-23                 104.0     46.4     3.01    2827   100.0    61720    9867   1.178  ! Near Maximum !
Alliant Reloder-19                  98.5     44.9     2.91    2801    98.8    62000   10433   1.179  ! Near Maximum !
Alliant Reloder-16                  95.3     42.3     2.74    2799   100.0    62000    9606   1.188  ! Near Maximum !
Ramshot Hunter                      94.0     44.3     2.87    2798    99.9    62000   10095   1.185  ! Near Maximum !
Winchester 760                      88.8     42.8     2.77    2791    99.7    62000   10108   1.188  ! Near Maximum !
Hodgdon H414                        88.8     42.8     2.77    2791    99.7    62000   10108   1.188  ! Near Maximum !
Vihtavuori N550                     90.8     42.3     2.74    2776   100.0    62000    9757   1.197  ! Near Maximum !
Hodgdon H4831 SC                   100.0     46.1     2.99    2776    97.1    62000   10284   1.177  ! Near Maximum !
IMR 4831                            97.9     42.7     2.77    2757   100.0    62000    9402   1.201  ! Near Maximum !
Vihtavuori N165                    103.9     46.9     3.04    2749    99.1    62000    9746   1.190  ! Near Maximum !
Hodgdon H4350                       96.2     42.9     2.78    2741    99.3    62000    9620   1.193  ! Near Maximum !
IMR 4350                            94.4     42.8     2.77    2740    99.4    62000    9600   1.193  ! Near Maximum !
IMR 4955 Enduron                   101.1     44.8     2.91    2740    97.3    62000    9977   1.189  ! Near Maximum !
Hodgdon Hybrid 100V                 95.9     42.3     2.74    2738   100.0    62000    8837   1.196  ! Near Maximum !
Vihtavuori N160                    104.0     45.5     2.95    2728    97.6    61853    9727   1.192  ! Near Maximum !
IMR 4451 Enduron                    90.7     40.9     2.65    2727    99.6    62000    9459   1.197  ! Near Maximum !
 
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