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338 r.u.m. 300gr otm 2970fps!!!

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  #1  
Unread 04-02-2013, 08:40 AM
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Location: minco, ok
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338 r.u.m. 300gr otm 2970fps!!!

just thought I'd share this little recipe with you guys I have a Remington 700 bdl (engraved) with a 1.20 strait taper shilen 1:9 rachet rifle barrel 31" long chambered in 338 ultra mag I had it throated to 4.088 Col shooting 92gr of retumbo with Berger otm 300gr bullets 55deg out at 1100ft 1-2965 2-2977 3-2980, 4-2968, 5-2972 .75ish group @ 200yds the bergers are .010 off lands ...all rem brass was easy reloadable no primer streching to speak of zero pressure signs...so pumped
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  •   #2  
    Unread 04-02-2013, 10:20 PM
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    Re: 338 r.u.m. 300gr otm 2970fps!!!

    Nice! My 300 gr otms are going 2830 corrected out of a 27.5 broughton 5c with 90 grs of H-1000
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    Remington model 700 300 RUM LH 26" rem ss/blued receiver lam stock 215 Berger @3070/180 NAB @3300
    Remington model 700 338 RUM LH 26" Bartlein 5C #4 Muscle Brake, blueprinted action, sako extractor, jewell trigger, bell and carlson Alaskan stock
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      #3  
    Unread 04-02-2013, 10:50 PM
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    Re: 338 r.u.m. 300gr otm 2970fps!!!

    Quote:
    Originally Posted by mcharger440 View Post
    just thought I'd share this little recipe with you guys I have a Remington 700 bdl (engraved) with a 1.20 strait taper shilen 1:9 rachet rifle barrel 31" long chambered in 338 ultra mag I had it throated to 4.088 Col shooting 92gr of retumbo with Berger otm 300gr bullets 55deg out at 1100ft 1-2965 2-2977 3-2980, 4-2968, 5-2972 .75ish group @ 200yds the bergers are .010 off lands ...all rem brass was easy reloadable no primer streching to speak of zero pressure signs...so pumped

    Sounds fast, but nice vel, and group..
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      #4  
    Unread 04-03-2013, 05:34 AM
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    Re: 338 r.u.m. 300gr otm 2970fps!!!

    that's what I thought I was expecting 2800 and I don't know when it happens bit the elite hunters leave jackets about 150 yards and I mean I found 3 out of 5 jackets within 10-15 feet of eachother
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      #5  
    Unread 04-03-2013, 08:21 AM
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    Re: 338 r.u.m. 300gr otm 2970fps!!!

    That's smoking, what chronograph and what altitude?

    I just finished load work up on a 338 EDGE with a 29 3/4" hart 1 in 10 barrel. I got 2837 fps average with 92.5 gr of H-1000 and a CCI 250's with the 300 OTM's.

    This was from an Oehler 35 chronograph 18' from the muzzle and 4100' ASL

    Thanks'
    Jeff
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      #6  
    Unread 04-03-2013, 08:41 AM
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    Re: 338 r.u.m. 300gr otm 2970fps!!!

    Quote:
    Originally Posted by mcharger440 View Post
    I don't know when it happens bit the elite hunters leave jackets about 150 yards and I mean I found 3 out of 5 jackets within 10-15 feet of eachother
    This is sounding like what some were seeing with the with the Gen 1's when using tight twist tubes and velocity over 2850.

    How deep is your rifling scribing the jackets? Is it by chance a 3 grove?

    Jeff
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      #7  
    Unread 04-03-2013, 08:58 AM
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    Join Date: Sep 2012
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    Re: 338 r.u.m. 300gr otm 2970fps!!!

    as far as the rifling depth goes in not sure but I can clearly see it and it is a 4 groove.. The chronograph is a chrony on a bright sunny day at 1100 ft
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