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Thread: source for tungsten rod/butt stock weights

  1. #1
    Join Date
    Dec 2017
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    585

    source for tungsten rod/butt stock weights

    gentlemen,
    i am finishing up a rifle for extreme long range.
    it is a 40 lb bench rest class.
    i am close to 18 lbs with a 8 lb bbl and a long range stock( LRB ).
    i would like to add some weight. to better balance and cause it
    is a 338 edge with 275/300 gr bullets.
    current center of gravity is 3.5" in front of the recoil face/10.5 from the front end of the stock.
    long range guys where do you like your center of gravity ?

    in the past i have cast 1" dia lead in 1 lb slugs. can still do that but thought
    tungsten might be neater, maybe lower in the stock.
    Last edited by retired; 06-14-2019 at 02:12 PM.

  2. #2
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    Jul 2016
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    Arizona
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    In some movie theater projector light bulbs there is a chunk of tungsten. They burn out regularly and are replaced.
    M

  3. #3
    Join Date
    Feb 2003
    Location
    Melbourne, AUSTRALIA
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    76
    Quote Originally Posted by retired View Post
    gentlemen,
    i am finishing up a rifle for extreme long range.
    it is a 40 lb bench rest class.
    i am close to 18 lbs with a 8 lb bbl and a long range stock( LRB ).
    i would like to add some weight. to better balance and cause it
    is a 338 edge with 275/300 gr bullets.
    current center of gravity is 3.5" in front of the recoil face/10.5 from the front end of the stock.
    long range guys where do you like your center of gravity ?

    in the past i have cast 1" dia lead in 1 lb slugs. can still do that but thought
    tungsten might be neater, maybe lower in the stock.

    source for tungsten rod ?
    eBay. Do a search for the size you are looking for

  4. #4
    Join Date
    Dec 2017
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    585
    i do not do biz with ebay as they are anti-gun.
    amazon showed a bunch, but it is not as dense as i was led to believe.
    i think i will stick with lead.

    Quote Originally Posted by Michael Huebner View Post
    eBay. Do a search for the size you are looking for

  5. #5
    Join Date
    Apr 2017
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    DFW, TX
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    Quote Originally Posted by retired View Post
    ...source for tungsten rod ?
    https://store.mttm.com/crankshaft-weight?orderby=10

  6. #6
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    Feb 2006
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    California...unfortunately
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    646
    McMaster Carr has tungsten.

  7. #7
    Join Date
    Apr 2006
    Location
    Kentucky-Home of the Kentucky Wildcats
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    2,235
    A quick Google search yielded this

    Tungsten has a density of 0.70 lbs/in3, which means that a cube of tungsten one inch on all sides would weigh 0.70 lbs 1.74 times more than the same sized cube of lead. ... Using a denser weight, like tungsten, allows you to more precisely place the weight.

    It's not cheap! Ebay has been the best resource for me. No, I'm not an eBay fan either but when it's half the price...I have to bite the bullet at times.

  8. #8
    Join Date
    Oct 2007
    Location
    Northwest Ohio
    Posts
    539
    I found a product on Amazon that is a bucking bar for rivets. It was just the right size and very easy to machine. About $90 for a 3" piece and weighed I believe 1.8lbs?
    Do a search for "tungsten bucking bar" and it is down the page a little.
    Hope this helps
    Mike
    Last edited by savet06; 06-19-2019 at 09:44 PM.

  9. #9
    Join Date
    Dec 2017
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    585
    i'll have to go back an look, all i saw was lighter...maybe an alloy ?

  10. #10
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    Dec 2017
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    this is a copper tungsten alloy...about the same or less dense than lead.

    1" dia-1" long, 1/2 lb

    Quote Originally Posted by Kyle Schultz View Post

  11. #11
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    Apr 2017
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    DFW, TX
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    Sir... You are Wrong

    Quote Originally Posted by retired View Post
    this is a copper tungsten alloy...about the same or less dense than lead.

    1" dia-1" long, 1/2 lb
    The density of lead is 11.36 gr/cm3.

    A 0.5" x 1" carbide weight from the source I gave is reported to weigh 0.13 lb. That's 2.08 oz. I weighed one of the weights I have and got 57 gr which converts to 2.01 oz. Pretty damn close. A 0.5"x1" cylinder is 0.19635 cu in which converts to 3.22 cm3.

    57 gr divided by 3.22 cm3 yields a density of 17.72 gr/cm3. Compared to pure lead, the tungsten weights referenced above are 56% denser.

  12. #12
    Join Date
    Dec 2003
    Location
    washington.........STATE that is.
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    If you gurgle "specific gravity of metals" you'll probably find a chart.

    The way I read it;
    -lead=11.34
    -gold=19.25
    -tungsten=19.25
    -tungsten carbide (old milling bits)=14.29, still heavier than lead

  13. #13
    Join Date
    Dec 2003
    Location
    washington.........STATE that is.
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    BTW I have small removable cots of loose lead shot in my 600LG and it shoots. I use a "spring" of collapsable material to hold the shot forward with the buttplate.

    I have an epoxy/shot matrix cast into my other 600LG and it too shoots.

    I have some old milling bits set aside to be epoxied into hunting rifles, they lock in really stout!

    I start my balancing act by using the action face as my balance point.

    Some who post here (Boyd comes to mind) have more informed opinions on proper balance, I'm just a "wiggle til it shoots dots" hacker.

  14. #14
    Join Date
    Dec 2017
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    585
    your math may be great but facts off life,
    my lead alloy is 1 lb for 3" of 1" dia
    the alloy you suggested was only slightly heavier in the same shape

    i deal in 1" dia and lbs....you have a good day

    Quote Originally Posted by Kyle Schultz View Post
    The density of lead is 11.36 gr/cm3.

    A 0.5" x 1" carbide weight from the source I gave is reported to weigh 0.13 lb. That's 2.08 oz. I weighed one of the weights I have and got 57 gr which converts to 2.01 oz. Pretty damn close. A 0.5"x1" cylinder is 0.19635 cu in which converts to 3.22 cm3.

    57 gr divided by 3.22 cm3 yields a density of 17.72 gr/cm3. Compared to pure lead, the tungsten weights referenced above are 56% denser.

  15. #15
    Join Date
    Dec 2017
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    585
    evidently lots of tungsten alloys out there
    i see no significant advantage of
    14.29 over 11.34 for the cost involved.
    i am still searching for 1" dia x 3" long closer to the 19.25

    Quote Originally Posted by alinwa View Post
    If you gurgle "specific gravity of metals" you'll probably find a chart.

    The way I read it;
    -lead=11.34
    -gold=19.25
    -tungsten=19.25
    -tungsten carbide (old milling bits)=14.29, still heavier than lead

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