7wsm or 7mm/300wsm

Discussion in 'Rifles, Bullets, Barrels & Ballistics' started by nddodd, Jul 29, 2009.

  1. nddodd

    nddodd Well-Known Member

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    Alright guys im fixing to order a new barrel in one or the other which do ya'll think is the best all round accurate choice, the 7wsm or the 7mm/300wsm.

    Lets say the majority goes with 7mm/300wsm, will regular 7wsm dies work or not. Seeing as how i've already got 7wsm dies.

    I know from what ive read the 7mm/300wsm is made off of the 270wsm or the 300wsm i've also got 100rounds of new 270wsm brass.

    But if ya'll think that the 7wsm is the way to go thats good too, just curious what the rest of you guys thought.

    One more thing what barrel length would ya'll go for i will do most of my shooting at targets 70per. of the time so weight isnt a big issue for me.

    Thanks
    Nathan.
     
    Last edited: Jul 29, 2009
  2. geargrinder

    geargrinder Well-Known Member

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    7mmWSM dies will not work. The 7mm has longer walls and a shorter neck.

    I would vote that you go 7mmWSM since you already have the dies. You can also use the 270WSM brass, just takes a little fireforming.

    That's what I'm doing with 270WSM Norma brass in my 7mmWSM.

    The only thing you are loosing is the neck length. Serious bench guys would rather have the neck length than the capacity. I'd rather have the 50fps.
     

  3. 300WSMMAD

    300WSMMAD Well-Known Member

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  4. J E Custom

    J E Custom Well-Known Member

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    +1 for the 7mm WSM.

    J E CUSTOM
     
  5. nddodd

    nddodd Well-Known Member

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    Sound awsome guys that article was very impressive. Hope I can have similar results with mine.

    What barrel length would yall go with and contour.

    Thanks again gentleman
    Nathan
     
  6. geargrinder

    geargrinder Well-Known Member

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    Mine is an 28" long Savage Varmint taper 8" twist.
     
  7. 308 nate

    308 nate Well-Known Member

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    nddodd,

    I have had both the 7WSM's and the 7-300WSM's my personal pick would be the
    7-300WSM, for a few reasons.
    1- a longer neck for more bullet support when used as a repeater.
    2- very easy use of Norma .270 brass

    As far as dies you can use a Redding type S .270WSM full length sizer, with a .312 neck bushing, with no alterations and a 7WSM seating die can be used with no alterations, but I do like to shorten the bottom of the die to accommodate the shorter head space.


    Things to ponder though as the 7-300 is not for everyone

    1- A 7-300WSM will chamber in a .270 WSM factory rifle..BAD THINGS WILL HAPPEN!

    2- No factory ammo available


    it will definitely be the 7-300WSM for me as I like as little brass prep as possible and the longer neck.

    Just my $.02

    308Nate
     
  8. nddodd

    nddodd Well-Known Member

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    I'm kinda leaning towards the 7wsm since I already have the dies, with the 270wsm brass will i have to do anything extra to the case otherthan the normal deburring primer pocket, chamfer inside, outside ofcase neck.

    When I order mybarrel do I need to tell them I am wanting to shoot the heavier bullets so they can throat it for the longer bullets.

    I'm thinking of going w/the Brux barrel has anyone used these before and did you like it.
     
  9. 308 nate

    308 nate Well-Known Member

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    Understood.
    If you are using Norma brass in a 7WSM use 300WSM brass. So when you size it down you have a false shoulder to head space off of. This will be like fire forming an Ackley..exaggerated as you will be blowing the whole case forward. I also recommend seating the bullets to touch the lands in your fire forming as this gives you an extra head space stop. Be careful.

    Only thing I do to Norma brass is chamfer the inside of the neck and ream the inside of the primer pocket. Not to say more can't be done. I just have a hard time holding onto a piece of brass for that long:D

    Brux is an excellent choice!! I have used around 100 of them and haven't had a bad one yet. Not to mention they are great to deal with! I would recommend a 9 twist. If you are shooting primarily 180's I would go with a 8.6 twist.


    308nate
     
  10. nddodd

    nddodd Well-Known Member

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    Thanks so much for your info Nate I appreciate it. Should I get some 300wsm brass or will the 270wsm be ok to use.

    Thanks again
    Nathan