257 Roberts Improved

Discussion in 'Reloading' started by Nomad, Mar 19, 2008.

  1. Nomad

    Nomad Banned

    Messages:
    366
    Joined:
    Jul 1, 2007
    Just got a 257 plan on using it for varmints, pronghorn, and deer.
    Plan on using a 100gr bullet for all, could use some load data for
    the 100gr or something close ... Thanks
     
  2. landcbeitner

    landcbeitner Well-Known Member

    Messages:
    421
    Joined:
    Jan 13, 2008
    257 Robers Ackley Improved
    100gr bullets

    Powder--- min load gr./fps.--- max load gr./fps
    4895------ 36.3/ 2800-------- 43.5/ 3200
    Varget---- 37.6/ 2900-------- 44.2/ 3200
    4064------ 35.9/ 2800-------- 43.5/ 3200
    RL-15----- 39.1/ 3000-------- 44.1/ 3200
    4350------ 45.2/ 3000-------- 48.0/ 3200
    RL-19----- 45.8/3000--------- 50.4/ 3200
    4831------ 47.3/ 3000-------- 50.4/3200

    This is from the Sierra Manual.
     
    Last edited: Mar 20, 2008