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30-378 barrel length

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  #1  
Unread 06-27-2011, 06:13 AM
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30-378 barrel length

Hi all just purchased an accumark in 30-378 and sticking a new barrel on for some long range hog and deer busting.

Any sugguestions on optimum barrel length for this CAL? and what sort of twist would i be needing to shoot say 168-200 slugs.

any feedback is good feedback

i was after a 338am.. but now the 375 is out il sit on that for a while
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  •   #2  
    Unread 06-27-2011, 06:46 AM
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    Re: 30-378 barrel length

    30" with a 10" twist will run to potential. Wouldn't go much shorter in order to burn all that powder.

    Steve
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      #3  
    Unread 06-27-2011, 07:43 AM
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    Re: 30-378 barrel length

    Quote:
    Originally Posted by RockyMtnMT View Post
    30" with a 10" twist will run to potential. Wouldn't go much shorter in order to burn all that powder.

    Steve
    +1

    Mine has a 29 3/8" (30" blank) and it about all you need unless you are going for max velocity
    then a 32" to 34" is nessary with huge doses of 50 BMG.

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      #4  
    Unread 06-28-2011, 12:01 AM
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    Re: 30-378 barrel length

    thx lads 32-34 inch adds about what 100fps?
    also what sort of freebore do u have on your guns? as the wby factory free bore is huge.

    Last edited by Ozyboarhunter; 06-28-2011 at 12:12 AM.
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      #5  
    Unread 06-28-2011, 02:11 AM
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    Re: 30-378 barrel length

    I was told by GS custom bullets that u would need a 1-9 for the monlithic 160 -177 and a 1-8 for there 198 grners bullets. But if they didnt work out, what bullets would u use?? Then Berger quote for the 185 VLD a 1-12 NOW i am scratching my head. MAybe i will use a slingshot instead and wont worry about a twist.
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      #6  
    Unread 06-28-2011, 06:42 PM
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    Re: 30-378 barrel length

    bumpp
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      #7  
    Unread 06-28-2011, 09:07 PM
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    Re: 30-378 barrel length

    I added 30" 10twist Lilja (at his recommendatio) to mine and get regular 6-7 inch groups at 1000 yes but found 240smk was more accurate than 175 200 and 210s
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