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Any advantages of the 300/7mm wsm?

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Unread 03-24-2008, 08:39 PM
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Location: Oklahoma City, OK
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Any advantages of the 300/7mm wsm?

I am in the process of building my second ever custom rifle and wanted to get some feed back from some guys. I was wondering what the advantages or disadvantages of a 300/7mm wsm would be over a standard 7 wsm. The one thing I can see right off the bat is that the 300 case has a longer case neck which is always nice, and that brass will be easier to find. Are there any other advantages or disadvantages? One of my main questions that I haven't been able to figure out is if I will gain or lose case capacity and how velocity will be affected. My gunsmith is having to order a 7mm wsm reamer throated for 168 vld's, so I got to thinking if there was a true advantage why not go ahead and get the 300/7mm wsm. The gun is being built on a stiller predator long action and a hart #7 1:9 twist. Any other advice on the gun or caliber is welcome also. Thanks ahead of time to everyone who responds.

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    Unread 03-25-2008, 09:36 AM
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    I don't own either, but from what I have read the 7mm WSM should offer a slight advantage in volume since the neck is shorter. However, the shorter neck is also a disadvantage as you have stated. So its the short neck with greater volume or the long neck with reloading advantages. I don't think you can go wrong with either.

    Last edited by Shortmagman; 03-25-2008 at 09:46 PM.
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    Unread 03-25-2008, 07:25 PM
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    Here's an article I just read on this subject.

    Vince B's 7mm WSM Record-Breaker (7 Win Short Mag)
    Tight Groups
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    Unread 03-25-2008, 10:06 PM
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    all i can say is that my 7mm wsm is an awsome gun. i would highly recomend this caliber. i havent found a problem with finding brass.
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    Unread 03-26-2008, 07:47 AM
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    longer neck with the 300 WSM brass, only a touch less case capacity (longest neck is on the 270WSM brass). I shoot the straigh 7WSM. A bit more neck would be nice, but is not affecting me as far as I can tell. I long-throated my current rig to get teh boat tail junction above the neck/shoulder junction and you could easily do the same to maximize capacity in the 7/300WSM

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    Unread 01-09-2013, 10:53 PM
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    Re: Any advantages of the 300/7mm wsm?

    Thank you, TCKev, for that article. Well written by a humble champion, and very informative.
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    Unread 01-10-2013, 12:16 AM
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    Re: Any advantages of the 300/7mm wsm?

    7mmWSM brass can be made from 270WSM or 300WSM brass with a simple neck size and fireform.

    I use Norma brass in mine.
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