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chamfer primer pocket edge?

Discussion in 'Handloading and Reloading' started by Sven, Sep 22, 2003.

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  1. Sven

    Sven Senior Member

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    Reading John Paul Jones' excellent manual on progressive loading, I noticed that he recommends chamfering the primer pocket lip. What is the benefit to this, and how necessary is this step?
     
  2. Poodleshooter

    Poodleshooter Member

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    It's basically only necessary when primers are crimped into the pocket. That means military and surplus ammo are the only types that would need this done on a regular basis.
     
  3. Black Snowman

    Black Snowman Member

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    This makes primer seating more relaiable. Some brass, Speer in particular, is already chamfered or radiused to help with this. I need to start doing this for all my progressive brass because the only failures I get in my Lee Loadmaster are primer related.

    On my military .308 brass the primer pockets were cripmed and I HAD to chamfer them for a primer to go in at all.
     
  4. C.R.Sam

    C.R.Sam Moderator Emeritus

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    A must if old primers were crimped.
    Desired otherwise.
    Ease of consistant primer seating.

    Sam
     
  5. larryw

    larryw Member

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    IMI 308 brass already nicely chamfered. ;)
     
  6. HSMITH

    HSMITH Member

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    S&B is another one that NEEDS chamfered. That crap has REALLY tight primer pockets and will give you fits if you don't chamfer a little.
     
  7. larryw

    larryw Member

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    That's note even close to my experience with S&B.
     
  8. Paul "Fitz" Jones

    Paul "Fitz" Jones Moderator - Emeritus

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    My Reloader manual

    In my little "Blue" booklet that Sven is referring to I was talking about GI brass which I prefer over all brass if it is available in the calibers I reload and shoot.

    The manual is "How To Live With And Love Your Progressive Reloader" By me and was included in all the progressive reloaders I sold in typewritten sheets in my Star and Auto Champ sales until C-H asked me for it for their factory output of Auto Champs to keep their customers from complaining about the Auto Champ when it was their customers selection of components that were causing the injuries and complaints. C-H printed a supply for me in the Blue booklet form with an Auto Champ picture on its cover but the information it contains is relevant to all progressive and other reloaders.

    The Bullseye list last year caused me to reprint it a couple of times and I have some available. E-Mail me at coffeyn1@castles.com for more information.

    John Paul Jones
    Star Progressive Reloaders Discussion Group
     
  9. Sven

    Sven Senior Member

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  10. LewG

    LewG Member

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    As an alternative to using a cricket to ream the primer pocket crimp, you can use the CH press mounted primer pocket swage, or the Dillon base mounted primer pocket swage.
    If you have a lot of brass to do, the Dillon is really nice.
    These do not uniform the depth of the primer pockets. That is a separate reamer with a bottom cutter. - Lew
     
  11. Steve Smith

    Steve Smith Moderator Emeritus

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    Or you could just buy processed LC barss that has had the pockets swaged. No need for chamferring. At least, not with a Dillon.
     
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