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Trail Boss: .357mag & .44mag

Discussion in 'Handloading and Reloading' started by roo_ster, Jan 9, 2006.

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  1. roo_ster

    roo_ster Member

    Joined:
    Oct 2, 2003
    Messages:
    2,974
    Location:
    USA
    In the last month I have done some load development with Trail Boss for my S&W 686 & my wife's Rossi 92.

    Some general notes:
    1. As powder charges near "maximum," there is less fouling, if it existed to begin with.
    2. As powder charges near "max," the groups tighten up
    3. Not very smokey at all
    4. All light loads



    Now .357mag:
    Code:
    Cartridge        .357_Magnum   .357_Magnum   .357_Magnum   .357_Magnum   .357_Magnum
    Date              2005-12-19    2005-12-19    2005-12-19    2005-12-19    2005-12-19
    Temp                  44            44            44            44            44
    Wind
    Wpn_Manuf       Smith & WessonSmith & WessonSmith & WessonSmith & WessonSmith & Wesson
    Wpn_Model            686           686           686           686           686
    Wpn_BBL               4             4             4             4             4
    Bullet_Manuf        Rucker        Rucker        Rucker        Rucker        Rucker
    Bullet_Const         Cast          Cast          Cast          Cast          Cast
    Bullet_Profile       SWC           SWC           SWC           SWC           SWC
    Bullet_Wt            158           158           158           158           158
    Bullet_Base         Bevel         Bevel         Bevel         Bevel         Bevel
    Bullet_Diam         0.358         0.358         0.358         0.358         0.358
    Powder_Manuf         IMR           IMR           IMR           IMR           IMR
    Powder_Name       Trail_Boss    Trail_Boss    Trail_Boss    Trail_Boss    Trail_Boss
    Powder_Wt            3.2           3.6           3.8            4            4.2
    Primer_Type          SPM           SPM           SPM           SPM           SPM
    Brass_Manuf        Federal       Federal       Federal       Federal       Federal
    Crimp               Roll_H        Roll_H        Roll_H        Roll_H        Roll_H
    Group_Size          19.25          6.5           9.25          4.8          9.125
    Group_Num_Shots       10            9             10            10            10
    Group_Dist            25            25            25            25            25
    MOA              73.52958371   24.82817112   35.33239737   18.33464944   34.85493254
    MOA/Shot         7.352958371    2.75868568   3.533239737   1.833464944   3.485493254
    Comments            Clean         Clean         Clean         Clean         Clean
    
    .357mag notes:
    1. Not benchrest conditions: back resting against a terribly uncomfortable pole with elbows on knees.
    2. Very clean burning & no signs of lead fouling
    3. Will perfom one more develop[ment iteration: 3.9-4.2gr in .1gr increments.
    4. BBL & chambers given a dry brass brush between bullet weights


    Now .44mag:
    Code:
       Cartridge             .44_Magnum                   .44_Magnum                             .44_Magnum                               .44_Magnum
          Date                1/8/2005                     1/8/2005                               1/8/2005                                 1/8/2005
          Temp                   75                           75                                     75                                       75
          Wind                 20_170                       20_170                                 20_170                                   20_170
       Wpn_Manuf                Rossi                        Rossi                                 Rossi                                    Rossi
       Wpn_Model                 92                           92                                     92                                       92
        Wpn_BBL                  20                           20                                     20                                       20
      Bullet_Manuf             Rucker                       Rucker                                 Rucker                                   Rucker
      Bullet_Const              Cast                         Cast                                   Cast                                     Cast
     Bullet_Profile              SWC                          SWC                                   SWC                                      SWC
       Bullet_Wt                 240                          240                                   240                                      240
      Bullet_Base               Bevel                        Bevel                                 Bevel                                    Bevel
      Bullet_Diam               0.43                         0.43                                   0.43                                     0.43
      Powder_Manuf               IMR                          IMR                                   IMR                                      IMR
      Powder_Name            Trail_Boss                   Trail_Boss                             Trail_Boss                               Trail_Boss
       Powder_Wt                 6.1                          6.5                                   6.9                                      7.3
      Primer_Type                LP                           LP                                     LP                                       LP
      Brass_Manuf             Remington                    Remington                             Remington                                Remington
         Crimp                 Roll_H                       Roll_H                                 Roll_H                                   Roll_H
       Group_Size               1.071                       0.8835                                 0.5085                                   0.7585
    Group_Num_Shots               5                            5                                     5                                        5
       Group_Dist                13                           13                                     13                                       13
          MOA                7.867151264                  6.489848872                           3.735244087                              5.571647277
        MOA/Shot             1.573430253                  1.297969774                           0.747048817                              1.114329455
    
    1. 6.9gr charge was one ragged hole
    2. Shot from supported prone
    3. One more iteration of development: 6.9gr-7.3gr in .1gr increments.
    4. Never more than light powder fouling, got less as charge increased
    5. BBL was given a dry brass brush between charge weights.

    ---------

    I am looking forward to comlpeting the next development iteration and getting some plinker loads produced in volume.
     
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