7mm RUM or 300 RUM

Discussion in 'Rifles, Bullets, Barrels & Ballistics' started by Deerhntr71, Feb 11, 2013.

  1. Deerhntr71

    Deerhntr71 Well-Known Member

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    Ok, I have narrowed my choice down to the 7mm RUM and the 300 RUM. I am leaning towards the 7 RUM, I have always been a fan of the 7mm's. I know you shoot as heavy of bullets, but was wondering if with better ballistic coeiffent, if it is still the better choice. Do you think the 7RUM is a dying cartridge and the 300RUM is better. Any help on this would be greatly apppreciated, just getting into long range hunting.
     
  2. gunaddict

    gunaddict Well-Known Member

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    I just had a 7mm Ultramag built. 29 inch light palma Benchmark barrel, I have 50 BMG and Retumbo loaded with 180 Bergers. Haven't shot it yet as I am spending my extra time calling cougars.
    I am also having a 300 Ultramag built. Just waiting for the barrel. Benchmark 29 inch light palma. Plan on shooting the 210 Bergers. So it will be at least a month for any comparision.
     

  3. WildRose

    WildRose Well-Known Member

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    Hands down between the two the 300 is the superior round.

    Any 7mm with a case bigger than the 7mm STW is a waste of powder and will eat barrels up pretty quickly.

    There's nothing in N. America you cannot kill with confidence with the 7mm STW or 300 rum or for that matter the 300wm. I own all three, two of each actually! gun).
     
  4. MontanaRifleman

    MontanaRifleman Well-Known Member

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    I agree that once you start getting extremely overbore, your loss of efficiency goes up exponentially. I think the 300 would serve you better. With the coming of the Berger 195 in 7mm, that may change the picture a little with a good slow powder.

    If I was considering a 7 RUM, I would probably push the shoulder down to 40* and lengthen the neck to mitigate throat erosion. It is well know for eating barrels quick. A heavier bullet and slower powder would slow that process a little as well.
     
  5. shedhead

    shedhead Well-Known Member

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    I agree with montana, i have a rm700 sendro 7rum i can shoot the 180 bergs at 3150 in the rifle with no pressure signs using h1000. the problem i have is the guns sucks for groups .go custom have them ai it and leghten the neck and it will last along time. thats what im going to do. check out some of the specs on the allenmags thier monsters
     
  6. Lefty7mmstw

    Lefty7mmstw Well-Known Member

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    I've had both; the 300 rum will last longer, but the 7rum is a monster for offhand shots at moving critters, especially in the badlands. I've currently got a 7mmstw and a 300 rum, but may build another 7rum in the next year or two if finances allow.
    You have to pick your poison here, as the 7rum may only last 600-800 shots if full speed, but the 7stw will be within 100 fps topped out and go 1200-1500 rounds accurately. The 300 rum will often get over 1000 rounds with ease, especially if you don't let it heat up at all.

    Where in ND are you???
     
  7. 7stw

    7stw Well-Known Member

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    Yeah, what he said ! The 300 RUM is an awesome cartridge. The 7 rum is too much of a good thing. The STW will out shoot it, and out last it as well. As a matter of fact, the STW is making a comeback, and the 7 RUM is fading. IMHO.
     
  8. gamehawker

    gamehawker Well-Known Member

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    Ditto to what my buddy said about the the STW is making a comeback, and the 7 RUM is fading.

    I would prefer to have a 338 RUM instead of a 300 RUM. I've heard the 338 RUM is not the barrel burner the 300 RUM is.
     
  9. Lefty7mmstw

    Lefty7mmstw Well-Known Member

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    I don't think the 300 rum will kill a barrel very fast unless abused. I've already got more rounds on my 300 rum than got the barrel tired on my 7 rum and it'd still a 1/2 moa rifle with little barrel wear. The 338 rum is going to be easier on barrels, but the recoil is also up from the 30 rum a good bit.
    As far as the 7stw, well my friends I'll keep shooting one until I can't make brass; it is a heck of a round.
     
  10. WildRose

    WildRose Well-Known Member

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    I have 2 300wm's, one .264wm (going to build another) 0ne 300Rum, and currently two 7mm STW's.

    I thought long and hard about adding a 7mm Rum, but with the above rifles all will last far longer, are much more of a pleasure to shoot with lower recoil and blast and there's simply nothing you can do with the 7mm Rum you cannot do with the rest of the above, do it cheaper, and do it longer.

    If I had to settle for just one big magnum it would be hard to choose between the 7mm STW and the 300wm and the bottom line is the STW does it faster and flatter than even the 300wm.

    Out to a 1,000 yds there's simply no need for anything bigger than either the 7mm STW or 300 Rum but the 300wm will always be around and easy to find reloading components for it will be as well.

    In the 7's though overall you cannot beat the 7mm STW.
     
  11. Wachsmann

    Wachsmann Well-Known Member

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    I went down this same road with wanting to get the 7mmRUM as well. After much looking around and tring to find brass to reload I settled on a 300RUM sendero. First 3 shots with 178 a-max were toughing. Not bad for just starting breaken it in. Prior to purchase I started running some numbers on the bergers 210VLD's. If I can get 3050 to 3000 ft/sec you can push them a long long ways out there. I will say this a good recoil pad or a muzzle break will come in handy on this gun. Once this gun is broke in and dial in with a matching turret it going in the safe for most of the time. I must say I perfer overall shooting my 6.5. I'm also in the process of building a standard 7RemMag to shoot the 168 bergers. Really I dont think deer or elk will care if inside 1000yrds when shooting these rounds with the exception of the 6.5. Remember the animal e shoot will bleed and die just like you and me. But if its what you want and you have the money to burn than I alway say do it...Because this way you never look back in life thinking what if I had...x.y.or done z...:)gun)
     
  12. jwing

    jwing Well-Known Member

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    The 7 is the flattest with 180 3235in my 700,28"Brux 10 inch at a mile.
     
  13. Swamplord

    Swamplord Well-Known Member

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    definately the 300 RUM, anything a 7mm can do a 30 can do better !
     
  14. lloydsmale

    lloydsmale Well-Known Member

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    this is america, bigger is allways better!!