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300 RUM 180gr @ 3500 from a 26" barrel?!?!

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  #1  
Unread 07-10-2006, 06:09 AM
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300 RUM 180gr @ 3500 from a 26\" barrel?!?!

Gentlemen,

I was at the range chronographing loads yesterday and got some results that were surprising to me. I was able to get 3473,3502,3507, and 3493 from my Remington 700 Sendero in 300 Ultra.

I was shooting:
180gr Hornady SST
92gr of RL-25
Winchester WLRM
Remington Case
3.65 OAL

This was all done from a 26 inch barrel, with no pressure signs to be found. In fact I would think I could push it even higher if I wanted to. I was wondering if something like this was normal or even possible. I shot my 30-06 through the chronograph to verify that was reading in the correct range and it was. It was showing the 06 with a 165 in the 2800's range, which is where it should be.

Any ideas as to what would cause this or if I just found the holy grail of all loads for this gun?
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    Unread 07-10-2006, 06:46 AM
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    Re: 300 RUM 180gr @ 3500 from a 26\" barrel?!?!



    I would be cautious,I worked up to 99.5 grains of Retumbo in mine and got 3426 fps with no problems,but my next lot of Retumbo could only stand 96.5 grains and got 3340 fps any Higher and I had pressure problems
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    Unread 07-10-2006, 08:10 AM
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    Re: 300 RUM 180gr @ 3500 from a 26\" barrel?!?!

    You may have just gotten a good barrel that was chambered well. Some guns are just good shooters , I have a 300Win mag with an Obermeyer barrel that shoot alor faster than I thought that should , but thats where that gun likes to be shot.
    You maybe just one of the lucky ones
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    Unread 07-10-2006, 08:20 AM
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    Re: 300 RUM 180gr @ 3500 from a 26\" barrel?!?!

    Waffen,
    Read this link.
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    Unread 07-10-2006, 08:37 AM
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    Re: 300 RUM 180gr @ 3500 from a 26\" barrel?!?!

    It is my opinion that the 300 RUM is not a 3500 fps chambering in a 26" barrel with a 180 gr bullet. While you may not be seeing pressure signs there is one staring you right in the face, the chrono!!

    I have played with the 300 RUM alot, factory rifles and full customs I have built for customers and I would say in that barrel length, 3400 fps is legit comfortable top loadings. In some cases a bit over in others a bit less with this weight bullet.

    How many firings are you getting per case with this load. If you are not getting at least 4 firings without primer pockets loosening up I would say you are running to high in pressure.

    It sounds like you just got a rifle that was put together well. This will hide alot of pressure signs but remember the best pressure indicator you have is your chrono. Don;t forget to heed its warnings. IF you have to ask if this is unusual because of the high velocity, there probably is a reason to tone her down a bit.

    Just my opinion.

    Kirby Allen(50)
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    Unread 07-10-2006, 09:43 AM
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    Re: 300 RUM 180gr @ 3500 from a 26\" barrel?!?!

    FiftyDriver,

    I am still on my first set of brass for the RUM. I probably have 10 firings on each case. I know this is a lot and I know I need new brass in the worst kind of way. Money has been tight (only 21 and just bougth a house [img]/ubbthreads/images/graemlins/ooo.gif[/img]) and I have only been neck sizing since the first firing, so i'm not too worried about a case head seperation just yet. Although it's comming soon if I don't get new brass.

    The primer pockets are loose, however this started probably 3 firings back. I will back this load off a few grains and see what the chrono says. It was accurate though, which makes me happy as can be! I've been struggling to find a load that will work in this gun, and will hold together on an animal at 3200-3300FPS velocities.

    It doesn't like TSX's, Siroccos, or Interbonds so I guess I need to check out Noslers bonded lineup .

    I was wondering how the SST's compare? I was under the impression this was a psuedo varmint round, or would at least act like one in a 300 RUM at close ranges?
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    Unread 07-10-2006, 01:53 PM
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    Re: 300 RUM 180gr @ 3500 from a 26\" barrel?!?!

    [ QUOTE ]
    It is my opinion that the 300 RUM is not a 3500 fps chambering in a 26" barrel with a 180 gr bullet. While you may not be seeing pressure signs there is one staring you right in the face, the chrono!!


    Kirby Allen(50)

    [/ QUOTE ]

    +1 [img]/ubbthreads/images/graemlins/shocked.gif[/img]
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