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338-378 with RL33 and 300gr

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  #1  
Unread 07-15-2013, 07:26 PM
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338-378 with RL33 and 300gr

Finally had the chance to try some RL33 in my 338-378 with some 300 gr SMK. I started at 107 grs with 2707 fps and worked my way up reaching 3020 fps comfortably out of a stock Accumark with a 26 inch barrel. That is 100 fps better than I was able to achieve before. Next is accuracy work.
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  •   #2  
    Unread 07-16-2013, 09:12 AM
    dig dig is offline
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    Re: 338-378 with RL33 and 300gr

    Great news keep us posted!
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      #3  
    Unread 07-16-2013, 10:46 AM
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    Re: 338-378 with RL33 and 300gr

    Couples details I left out, FED 215 primers and seated the SMK's at Mag length 3.8 If I get the accuracy I am with RL25 I will be very pleased.
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      #4  
    Unread 07-16-2013, 11:23 AM
    B23 B23 is offline
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    Re: 338-378 with RL33 and 300gr

    How many grains of RL33 did you end up with to get 3020fps??

    I'm going to guess right around 120 grains, maybe even more.
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      #5  
    Unread 07-16-2013, 01:23 PM
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    Re: 338-378 with RL33 and 300gr

    118.0 I hit 3020 fps , 119.0 I hit 3,050 but had a little bit of sticky bolt lift and ejector button shiny spot Anyone looking at this though please work up your own load ,every rifle reacts different. This is a factory gun with weatherby freebore. 2920 fps was my previous best velocity with RL25.
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