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7mm Improved

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  #1  
Unread 02-11-2004, 09:46 PM
dwm dwm is offline
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7mm Improved

How much case capacity can be gained by Ackely improving a case? I am interested in:

7mm RUM AI
7mm WSM AI
7mm RSAUM AI

Thanks,

Doug
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  •   #2  
    Unread 02-11-2004, 10:08 PM
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    Re: 7mm Improved

    The 7 wsm has a 35 degree shoulder with is better in some aspects than the 40 degree ackley version. I would get the wsm and never look back. Thanks Reed
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      #3  
    Unread 02-12-2004, 02:07 AM
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    Re: 7mm Improved

    ..Second that.. I personally don't see enough gain available to justify the additional expense and hassle..
    .. But if yer hell-bent on it, check with Richard over at Richard's Custom Rifles.. I think he's messed with these a bit.. Good luck.. d:^) JiNC


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      #4  
    Unread 02-12-2004, 07:14 PM
    dwm dwm is offline
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    Re: 7mm Improved

    So I am just interested in what can be gained by improving these cases. What happens when you take out the case taper and make the shoulder steeper? How much volume can you can you gain?

    There are lots of 300/338 RUM improved dicsussions on this site. Lets hear about the big 7mm cases.

    Doug

    [ 02-12-2004: Message edited by: dwm ]
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      #5  
    Unread 02-12-2004, 08:06 PM
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    Re: 7mm Improved

    dwm

    On a 7 RUM I feel you would gain only a few grains (2 or 3) by blowing out the shoulder and increasing the shoulder angle by 5 degrees.

    I did some preliminary measuring on someone's 300 Tomahawk, which is a similar improvement to the 300 RUM. I'll have better measurements by tomorrow evening. Stay tuned.
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      #6  
    Unread 02-12-2004, 11:27 PM
    dwm dwm is offline
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    Re: 7mm Improved

    Thanks Len, this is what I was looking for.

    Doug

    [ 02-13-2004: Message edited by: dwm ]
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      #7  
    Unread 02-13-2004, 06:32 AM
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    Re: 7mm Improved

    Doug

    Your mother would be proud of you!
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