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Reloading Berger Bullets

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7mm LRM

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  #1  
Unread 09-25-2013, 11:20 PM
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7mm LRM

What is a 7MM LRM ? The difference between it and a 7mm WSM ?
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  •   #2  
    Unread 09-25-2013, 11:25 PM
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    Re: 7mm LRM

    7-375 Ruger with the shoulder pushed back and steepened to lengthen the neck. Pretty close to a 7-300wm for performance.
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      #3  
    Unread 09-26-2013, 12:26 PM
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    Re: 7mm LRM

    Quote:
    Originally Posted by IdahoCTD View Post
    7-375 Ruger with the shoulder pushed back and steepened to lengthen the neck. Pretty close to a 7-300wm for performance.

    I had heard similar performance, at lower pressures was the big thing.
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      #4  
    Unread 09-26-2013, 02:05 PM
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    Re: 7mm LRM

    Lower pressure ? How can you drive a bullet faster with lower pressure ?
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      #5  
    Unread 09-26-2013, 03:39 PM
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    Re: 7mm LRM

    Larger case capacity equals faster with less pressure. I don't really think the pressure they are operating at is that much (if any) less than most run the 7-300wm at.
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      #6  
    Unread 09-28-2013, 04:43 PM
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    Re: 7mm LRM

    does the 375 have a belt? I thought that was another benefit for some people.
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      #7  
    Unread 09-30-2013, 10:00 PM
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    Re: 7mm LRM

    There's a fair amount of info on the cartridge on here. It's a staple for the Gunwerks guys, and you can buy brass and dies from them.

    I don't own one, but the standard expectation I believe is 3050fps on 73.0 gr of H1000 for Berger 180's out of a 25.5-26.0" barrel. I believe that is a little better than your average 7-300WSM.

    You will see quotes from the Gunwerks guys, that it is very similar to the 6.5-284 dimensionally, and it benefits from the same case capacity to bullet diameter benefits, therefore providing improved efficiency.

    I bought worked over 700 in 7STW planning to re-barrel to the LRM, but found it shoots 168Bergers at 3120 extremely well and with a LOT less felt recoil than I expected, so the plan is still on hold. I will say that while Gunwerks markets the brass, the limited accessibility of brass would be a concern, it is even a problem on my SAAMI STW.
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