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7mm RUM w/ factory tube and the 175 SMK?

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  #1  
Unread 09-22-2006, 08:03 AM
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Join Date: Apr 2006
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7mm RUM w/ factory tube and the 175 SMK?

Have any of you 7mm RUM owners tried this bullet out of your factory 9.5 twist barrel? Sierra suggests a 8.5 twist or faster with this bullet, but I figured with the extra "push" that 90+ grains of powder gives it, the 9.5 should stabilize this bullet? anyone try this bullet?
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  •   #2  
    Unread 10-06-2006, 08:52 PM
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    Re: 7mm RUM w/ factory tube and the 175 SMK?

    bump
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      #3  
    Unread 10-07-2006, 08:04 AM
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    Join Date: Aug 2005
    Location: White City, Saskatchewan
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    Re: 7mm RUM w/ factory tube and the 175 SMK?

    Should be fine. I have been shooting 175 SMKs and 180 bergers out of my 1-9 twist 7mmSTW. It does have a 30" barrel so our velocities should be very close.
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      #4  
    Unread 10-08-2006, 01:35 AM
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    Re: 7mm RUM w/ factory tube and the 175 SMK?

    Not directly related but I´ve used the 162 amax in a 7 rm with a 9 1/2 twist; hornady recommended 8 but they shot very well.

    With the speed you´ll get from the 7 rum you should be ok. I would buy a box and give them a try.
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      #5  
    Unread 10-08-2006, 06:50 PM
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    Re: 7mm RUM w/ factory tube and the 175 SMK?

    Hi i have a Rem Model7 in 7mm SAUM and it has the same twist i have no trouble stabalising the 175gr Sierra, 180gr Berger or the 162gr A Max. in your barrel you will have no issue either. I also shoot a 284 Win for long range target shooting and it has a 9 twist and will stabalise all the above projectiles aswell.

    Go for it you will love the results.

    Cheers Bill
    Australia
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      #6  
    Unread 10-10-2006, 08:30 PM
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    Join Date: May 2001
    Location: Urich, MO
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    Re: 7mm RUM w/ factory tube and the 175 SMK?

    I shoot the 175s out of a 1-9 twist in a 7-08. With 7 RUM velocities a 10 twist will stabilize the 175.
    __________________
    Chris Matthews
    www.longshotriflesllc.com
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      #7  
    Unread 10-11-2006, 08:22 PM
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    Re: 7mm RUM w/ factory tube and the 175 SMK?

    A range report for you guys;
    I loaded the 175 SMK with 3 different powders- Retumbo, RL25 and Thought I would try some RL22 as well. Trying to find load data for the 7 RUM was a little difficult, but managed to get a few starting loads with the above Powders. As a side-note I talked to Dave Brown @ Sierra and he said that Sierra was not planning to publish any data for the 7RUM, but he did give me some starting data. First working up with RL 25 I got mediocre accuracy with my starting load (the best accuracy with this ladder) but the velocity did not get over 2800 fps. With the Retumbo I got pressure signs right out of the hop @ 2850 fps. and with the RL22 I got about the same in the accuracy department as the RL25 and was getting pressure signs once I hit 2950 fps. I originally bought this gun for the action (I am a lefty and hard to find leftys in canada) But decided to see if this gun would shoot. Long story short I burn 25 grains more powder for what a 7mm Rem MAg will do. All of the negative I have heard and read about this caliber I experienced. Oh well I have a new barrel on order in .284 and probably going with the 7 mag.
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