QuickLoad help needed

[Charlie-NY]

I am looking for loading data for the 45-70 in a modern Marlin lever action with 18.5" bbl. I bought a few boxes of 350 Swift A-Frame bullets and am hard pressed to find reliable info for this bullet. I have most powders in the appropriate burn rate for the 45-70. Looking to get to 2,000 ft/sec.

 

[JD338]

Charlie,

I have had great luck using H322 with 300 gr bullets at 2200 fps and 405 gr bullets at 1850 fps. You should be able to hit 2000 fps with the 350 gr Swift A Frame.
That will be a freight train stopper of a load.

JD338

 

[todbartell]

Cartridge          : .45-70 Gvt Marlin 1895
Bullet             : .458, 350, Swift A-Frame FN
Useable Case Capaci: 57.312 grain H2O = 3.721 cm³
Cartridge O.A.L. L6: 2.550 inch = 64.77 mm
Barrel Length      : 18.5 inch = 469.9 mm

Predicted Data for Indicated Charges of the Following Powders.
Matching Maximum Pressure: 34000 psi, or 234 MPa
or a maximum loading ratio or filling of 105 %
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 !

10 loads produced a Loading Ratio below user-defined minimum of 90%. 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 AR-Comp                    100.3     51.3     3.32    1923    95.3    34000    5062   1.236  ! Near Maximum !
IMR 3031                           105.0     51.9     3.36    1906    89.9    33637    5102   1.243  ! Near Maximum !
Alliant RL10x                       93.4     46.5     3.02    1883    94.3    34000    4750   1.246  ! Near Maximum !
IMR 4895                           104.1     55.0     3.56    1876    80.7    34000    4980   1.248  ! Near Maximum !
Hodgdon BL-C2                       99.7     57.5     3.73    1875    82.2    34000    5001   1.247  ! Near Maximum !
Hodgdon H322                        95.8     49.1     3.18    1871    89.3    34000    4750   1.235  ! Near Maximum !
Hodgdon H335                        90.8     52.4     3.39    1869    87.5    34000    4814   1.256  ! Near Maximum !
Winchester 748                      96.1     54.6     3.54    1869    83.6    34000    4889   1.249  ! Near Maximum !
Hodgdon H4895                      100.3     53.0     3.43    1864    82.1    34000    4847   1.257  ! Near Maximum !
Alliant RL15                       104.7     55.3     3.59    1861    79.5    34000    4859   1.253  ! Near Maximum !
Hodgdon CFE223                      97.8     57.6     3.73    1850    79.3    34000    4855   1.253  ! Near Maximum !
IMR 8208xbr                         97.5     51.5     3.34    1838    83.4    34000    4607   1.267  ! Near Maximum !
Ramshot BigGame                    103.5     58.3     3.78    1835    77.7    34000    4755   1.257  ! Near Maximum !
IMR 4320                           104.2     54.2     3.51    1814    78.5    34000    4511   1.264  ! Near Maximum !
Hodgdon Varget                     104.6     53.4     3.46    1813    78.9    34000    4498   1.270  ! Near Maximum !
Ramshot X-Terminator                94.0     53.0     3.44    1808    80.7    34000    4455   1.282  ! Near Maximum !
Hodgdon H380                       105.0     56.7     3.67    1806    75.6    32410    4631   1.283  ! Near Maximum !
Hodgdon Benchmark                   94.5     49.2     3.19    1802    84.7    34000    4373   1.270  ! Near Maximum !