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300 RUM--OAL Trouble

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  #1  
Unread 07-02-2010, 09:47 PM
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300 RUM--OAL Trouble

I finished a new Rem. 700 Police 26" factory bull barrel we put a Miculek muzzle break on etc.., etc.... I have checked OAL to the lands on 210 SMTKS, Berger 210 VLD, 210 Berger Long Range match, 180 gr Accubond, 200 Accubonds and they run from 3.800-3.815, but the inside the magwell is 3.725 max the book OAL is 3.600. If I load to be able to use the magwell, I'll have a .085- .100 jump to the lands. I new Weatherby's were a long throat but I had not seen a Remington like this. Is there a chance it will shoot? Sounds like the Bergers are out. Any help / experience would be appreciated. Looks like I can't get a decent oal until I set the barrel back.
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  •   #2  
    Unread 07-02-2010, 11:14 PM
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    Re: 300 RUM--OAL Trouble

    get a wyats extended window box for it and instal, it will increase mag box length by about .100"
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      #3  
    Unread 07-03-2010, 01:17 AM
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    Re: 300 RUM--OAL Trouble

    +1 with cowboy,my sendero was the same i went with the wyatts or seekins makes a dbm if you want to go that way,they both require little mods.
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    Unread 07-03-2010, 06:17 AM
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    Re: 300 RUM--OAL Trouble

    Were do I get that??? The Police version has a H & S precision stock, does that change the options? THANKS
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      #5  
    Unread 07-03-2010, 06:46 AM
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    Re: 300 RUM--OAL Trouble

    OK, I found the extended boxes, how hard are they to install??? I'll get my gunsmith to do it, but the bigger jobs get in line and the smaller jobs he'll work in sooner.
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      #6  
    Unread 07-03-2010, 09:36 AM
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    Re: 300 RUM--OAL Trouble

    Hey knc

    The RUM factory chambers all have long throats, at least all of the ones I have loaded for and heard of. The one I am working on now (Sendero) has a mag length of 3.700" and the 200 gr Accubond hits the lands with an OAL of 3.785". So in order to stay away from any problems with the tip of bullets hitting the mag during recoil or being broken off while being loaded into the magazine, I seat them at 3.625". IMO you can accomplish the same thing as seating depth variation with slight changes in the powder charge, it is all a matter of barrel timing



    IOW don't think that you can not find an accurate load just because you can't seat close to the lands.

    The Wyatt's box is interesting though and being a DIY guy, I am interested to see if anyone has done the installation themselves.
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      #7  
    Unread 07-03-2010, 09:35 PM
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    Re: 300 RUM--OAL Trouble

    Not a 2 minute job if you don't have a mill,but also possible with a steady hand and a dremel with a good carbide cutter.
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