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Reloading Berger Bullets

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257 Roberts Improved

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  #1  
Unread 03-19-2008, 06:59 PM
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Join Date: Jul 2007
Location: Idaho
Posts: 366
257 Roberts Improved

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
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  •   #2  
    Unread 03-20-2008, 12:31 AM
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    Join Date: Jan 2008
    Location: Everett, WA
    Posts: 421
    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.
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    Last edited by landcbeitner; 03-20-2008 at 12:37 AM.
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