bushing size ?

Discussion in 'Reloading Forum (All Calibers)' started by dansig, Nov 1, 2012.

  1. dansig

    dansig only here to get better at what I do :) Site $$ Contributor

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    I am ordering dies for my .308 and need to know what bushing size I should get
    I also need to know what bushing I need for the 6XC
     
  2. 284driver

    284driver Site $$ Contributor

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    Measure loaded neck diameter then subtract desired neck tension and an additional thousandths. So if neck diameter is. 336 and you want. 003 neck tension get a.332 bushing. If you don't have a loaded round measure neck wall thickness, double it, and add to bullet diameter. Then subtract desired neck tension and another thousandths.
     
  3. dansig

    dansig only here to get better at what I do :) Site $$ Contributor

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    I would if I could, haven't built the rifle yet.. just buying all components :)
     
  4. FroggyOne2

    FroggyOne2

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    Which kind of brass are you going to use?
     
  5. dansig

    dansig only here to get better at what I do :) Site $$ Contributor

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    I will be using Norma and Lapua brass, I will turn the necks just to get them even, as little as possible, but all in the same size.
     
  6. FroggyOne2

    FroggyOne2

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    If your going to turn the necks on Lapua brass, then I would consider a .331 & .332 bushing.
     
  7. Scott Harris

    Scott Harris Site $$ Contributor

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    My Lapua 308WIN is .0145-.0155 = .338 loaded round. Turning it .0142 cleaned it up 100% with a loaded diameter of .3365...I use a .334 & .335 bushing which give fairly light neck tension.
     
  8. jcampbellsmith

    jcampbellsmith Site $$ Contributor

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    I have a slow burning 6XC project. The reamer measures .274 inches at the neck. When I set up a dummy round with Norma brass and a 105gr A-Max, the loaded round measured .2705 inches. I have a range of bushings in stock, but will probably try .268 and .269 when this project eventually gets off the ground and into the field.

    Good luck. JCS
     
  9. Kingfisher

    Kingfisher

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    Similar story here. Building a 6XC. The dies showed up earlier in the week and the reamer showed up yesterday. With any luck the gun will go to Mark Pharr tomorrow. My reamer is set for a .2748 neck and I'm using Norma brass which specs out right at .270. I went with a .268 bushing. For the 6XC, the brass OD is pretty well documented for the different brass mfgs. Not sure about the 308. You'll probably have to actually load & check those. The 6XC #'s though are available on this site.
     
  10. Catfish

    Catfish

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    If you are going turn the necks and know what the neck dia. of your chamber, and it`s a tight neck, will be then you can get one how ever much smaller you want to leave for neck expantion. The brass will spring back abt. .001. I like to use .002 neck expantion so I use bushing .003 under neck chamber dia. If you don`t know all the inputs there is no way to tell.
     
  11. Leaddog

    Leaddog F-Class T/R Site $$ Contributor

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    For the .308, get a .334, .335, .336. I use these bushings with good results with Lapua brass. I never liked Norma brass too much. Too soft.
     

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