7 STW or RUM?

Discussion in 'Rifles, Bullets, Barrels & Ballistics' started by longrifle, Jul 19, 2009.

  1. longrifle

    longrifle Active Member

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    Two identical weight rifles, is there a SIGNIFICANT difference in felt recoil between the 7MM STW and the 7MM RUM? I've owned and loved the STW BUT the Rem 700 SPS SS is not offerred in STW now, not that I can find. It's either 7 MM Mag or the RUM. If there's a major difference(punishing!) difference would you consider a rechamber on a 7 MM Mag to STW and tailor the rechamber to a specific load thats performed extremely well in your other STWs?
     
  2. J E Custom

    J E Custom Well-Known Member

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    There is not a lot of difference in the recoil of a 7mm RUM and a 7STW but there is in velocity.

    At 300 yards the 7mm RUM delivers 24% more energy than the 7 rem mag and 12% more than
    the 7 STW.

    If your going to buy a new rifle I would buy the 7 Rem Mag and have it rechamberd to 7 STW
    or screw on a custom barrel chambered in 7 STW.

    If its the speed you want then just buy the 7 RUM and be done with it.

    I like both the STW and the RUM and they both have there strong points.

    With 140gr bullets the STW is very flat but the RUM can handle the bigger bullets at higher
    velocities because of case capacity.

    Probably not a lot of help but that's the difference.

    J E CUSTOM
     

  3. longrifle

    longrifle Active Member

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    Thanks! That makes the decision alot easier! In comparing factory ballistics I CAN see alot more downrange energy and better trajectory with a heavier bullet. Without a huge difference in recoil I'd just stick with the RUM, maybe swap for a custom barrel on THAT later to tweak accuracy! Should make a great bean field gun out to 500 or so with a good quality scope! Really appreciate the feedback!
     
  4. dirtball

    dirtball Well-Known Member

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    If you don't like the thump from the RUM, put a QUALITY side port brake on it and you can shoot it all day.
    Dave
     
  5. shiredude

    shiredude Writers Guild

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    He is exactly right, for the lighter bullets, the STW is the only way to go. THe RUM uses more powder for basically the same speeds. The only advantage I can see is with the 180 & 200 grain bullets you can get a little more velocity with the RUM. not enough to matter in my mind.

    It's still the STW for me, no matter what. (I have dies, brass, loads, etc) I have shot some 168 & 180's and they do fine for me.

    Everyone's got their opinions and these are mine.
     
  6. LouBoyd

    LouBoyd Well-Known Member

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    I don't own a 7mm RUM but have a 28" sporter weight 7mm STW Win 70 with a brake and 29.5" Rem 700 7mm STW which weighs about 12 lbs. Both of those are comfortable to shoot. I also have three 300 RUMS. 1 a 8 lb 26" sporter which is not at all pleasant to shoot, a 30" medium Palma 10 lb with a brake which is comfortable, and 15 lb 30" without a brake which is comfortable

    Of that bunch the 12 lb 7mm STW is my favorite ballistically and where I shoot can reach nearly 2000 yards supersoinic. It has tle lowest wind deflection and flattest trajectory of any. I built it as a 1 mile target rilfe and it's excellent for that.

    The ballistics program "quickload" has a decent recoil calulator. You can always add weight or a brake to cut down the energy and velocity.

    I consider the 7mm RUM as in the same class%
     
  7. Michael Eichele

    Michael Eichele Well-Known Member

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    With both of my 300 RUM's the velocity potential was awesome in the beggining. Once the throats were burned, the friction when up and subsequently so did the pressure. I had to reduce my 180 loads to around 3250 in both of them. My thoughts were that if I am stuck with 3250 with a 180 what the he!! am I using such a big freakin case for? I could easily run that with a 300 wby or sacrifice just a little less velocity and run the 300 WSM. I cant imagine the 7RUM being any better. My vote is for the 7STW. You may be having to run STW velocities some time after your barrel "breaks in". Not saying you will but I have read of two other cases where guys were having trouble with their 7RUM's increasing pressures over time and having to back off to lower loads.
     
  8. Long Time Long Ranger

    Long Time Long Ranger Well-Known Member

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    I can shoot a 26" barrel STW without a brake but can not shoot the ultramag without a brake effectively. I have two 7 ultras with 31 inch target barrels for shooting the heaviest available bullets and five 7mm stw's. The 7mm ultramag is a barrel killer. I agree with Michael. I would do the 7 stw if I were doing one 7mm. They are great accurate rifles capable of extreme range without a muzzle brake and easier on barrels. For a specialty rifle like my 7mm ultras they are very fun to shoot on a limited basis with the heaviest bullets at long range. You just got to get it zeroed and limit your shooting.