Need Help! How to size brass for 6.5wsm

Discussion in 'Reloading' started by win270wsm, Dec 15, 2012.

  1. win270wsm

    win270wsm Well-Known Member

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    Hey guys,

    I am looking at building a savage 10 in wsm and making it a 6.5 wsm. I have some experence reloading but not a ton. I was wanting to know how to resize the brass to make it 6.5 wsm? The dies that i have found all say 6.5-300wsm, does that mean that i have to use 300 wsm brass or can I use 270wsm. Seems like 270wsm would work better. Any information on how to do this process would be greatly apprectiated. I would also be interested in books and articles on this process. Thanks for you help.

    Trent
     
  2. winmagman

    winmagman Well-Known Member

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    270 and 300 wsm brass have the same dimensions (except neck diameter obviously) so the 270 would be easier to use. Probably the simplest route to go would be to pick up a set of Redding 270 wsm "S" type bushing dies and switch out the 270 bushing for the size needed to get the desired neck tension on your 6.5 wsm.

    Chris
     
  3. loaders_loft

    loaders_loft Well-Known Member

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    agreed, the bushing dies would be the way to go.
     
  4. win270wsm

    win270wsm Well-Known Member

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    would these rcbs dies from midway work RCBS Full Length Sizer Die 6.5mm-300 Winchester Short Magnum (WSM) or are they not right. Also, how do i find what size bushing that I need for the reddings to size to the 6.5. Also, am i correct in that the 6.5-300 wsm go/no go gauges are what i need for my barrel swap. Once again thanks for all your help.

    Trent
     
    Last edited: Dec 16, 2012
  5. Outlaw6.0

    Outlaw6.0 Well-Known Member

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    I agree here, I use 270WSM brass for my 6.5WSM. An S-Type die is the only way to go IMHO. As far as bushing selection goes, you are between a rock & a hard spot. The best way i've come up with to select the correct bushing size is to have a loaded round to measure (from your own lot of brass/bullet). I can give you some sizes to start with if that'll help, but you may end up buying more than one bushing to get the size just right. Do you plan to neck turn or are you running a no turn chamber? (I am).

    Also, I would recommend you buy the FL S-Type die. Meaning full length sizing, bushing style.


    t
     
  6. win270wsm

    win270wsm Well-Known Member

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    Ok outlaw would be great if you could get me close on bushing size. I would like to not have to turn necks if possible. I'm looking at a shilen savage replacement barrel. He has two different chamberings in 6.5wsm and 6.5wsm(.287) I think and not sure what difference is or what one I need.
     
  7. loaders_loft

    loaders_loft Well-Known Member

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    get the bushing recommendation from the gunsmith cutting the chamber.
     
  8. Outlaw6.0

    Outlaw6.0 Well-Known Member

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    For discussion sake; wouldn't the neck thickness of the brass & a bullet seated in the cartridge be a better indicator of necessary bushing diameter?


    t
     
  9. winmagman

    winmagman Well-Known Member

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    I would want to know both the neck diameter of the reamer and the O.D. of a loaded rounds neck. Since brass will expand to the chamber diameter then spring back a thousandth or so that will be the starting point for resizing. Ideally you would want a bushing that will be .002 to .005 smaller than the neck diameter of the chamber.

    Since you're starting with a .264 diameter bullet and wsm brass runs approx. .011 - .015 in neck thickness you're looking at somewhere between .288 - .296 for the neck O.D. of a loaded round. I you're on the .296 end of the spectrum and you have a .298 neck in your chamber you are running a dangerously close tolerance for a hunting rifle and would be wise to neck turn your brass. If you are at .288 with a.298 neck and buy a bushing to size back to .286 you are working the snot out of your brass.

    Bottom line is both are valuable bits of information that can be used together to help you produce the safest most accurate rounds for your individual rifle.

    DISCLAIMER: WSM brass thickness numbers are from memory as I have none on hand to measure. Don't take them as gospel, measure you lot.:D

    Chris
     
  10. Outlaw6.0

    Outlaw6.0 Well-Known Member

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    Winmag,

    You're right on with the numbers, my Norma brass runs .014"


    t
     
  11. camotruck

    camotruck Well-Known Member

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    Here's my new question on an old thread, I missed Redding by 10 min. Can I use a Redding type S bushing die 300 WSM and put the bushing I need (.290 - .292) to size 6.5 / 300WSM ? I know I can use 270 WSM to do it but, 1) The bushing die set for the 300 is less expensive than the one for the 270. and 2) I own a 300WSM and my son shoots a 270 WSM. and a 25/300 WSM. I'm hoping to get away with one die set and multiple bushings to cover 4 rifles


    Thanks Camo
     
  12. DocDoc

    DocDoc Well-Known Member

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    Check with Redding to be sure, but in the past when I checked with them they said you could only go one caliber. I asked about using the same die with different inserts doe .243/260/7mm-08.