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338 rum

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  #1  
Unread 03-25-2012, 03:29 PM
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Join Date: Mar 2012
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338 rum

New sub. to this site but i read it all the time. I just had a new 338 rum built on a savage 110 action with a 30" barrel. I am loading 93 grains of retumbo with 300 grain bergers with no pressure signs. Can anyone tell me what my vol. might be. thanks.
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  •   #2  
    Unread 03-25-2012, 03:42 PM
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    Join Date: Jun 2010
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    Re: 338 rum

    I would run it through a Chronograph or your just simply going to be guessing.
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      #3  
    Unread 03-25-2012, 04:14 PM
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    Re: 338 rum

    I'g guessing he does not have one. I would invest in one no one can tell you for sure.
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      #4  
    Unread 03-25-2012, 04:19 PM
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    Re: 338 rum

    I run a 338 LM with that same load and am at 2820 fps. I also have a 338 RUM and shoot the 250 SMK with 97 gens of H-1000. It's at 3021 fps. I could not get the 300 SMK to shoot well in this rifle. The TTSX 225 Barns shoot well with Retumbo in my rifle.
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      #5  
    Unread 03-25-2012, 05:03 PM
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    Location: utah
    Posts: 366
    Re: 338 rum

    Hey Goob! (funny thats my bros nick name) I would bet your pushing 2800 fps. Its hard to tell without a chrono or a drop. the average speed for this load in a 26" barrel is 2725. ad 20 fps per inch of barrel you end up with 2805(low ballish). This load should push your super sonic to around 2k
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      #6  
    Unread 03-25-2012, 09:22 PM
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    Join Date: Mar 2012
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    Re: 338 rum

    I want to get a chronograph. but i know nothing about them can anyone reccomend a brand. Also 95 grains makes the primer dents feel a little raised and rough is this signs of pressure?
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      #7  
    Unread 03-25-2012, 10:40 PM
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    Re: 338 rum

    When your primer raises like that its a pressure sign. I would say that you would do well not to go above your 93 grains.

    I have a 26" barrell on my .338 RUM and with 94 grains Retumbo Im getting right around the 2815-2820 at my elevation. you should be running a little faster with you 30" even though a grain less charge.

    I cant stress it enough, a chronogragh is seriously as important to long range shooting as a scope with turrets or hold-over reticle... you cant be effective at it without one (even though I've seen some old timers do some crazy stuff with ol' kentucky windage, still not great). I tried for a long time estimating my velocity. when I broke down and bought a chrony my game got 10x better overnight.

    *EDIT* I have a "shooter" chrony, cheap but it works.
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