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Thread: 25-06 loss of neck tension phenomenon

  1. #1

    25-06 loss of neck tension phenomenon

    just loading some rounds for my 25-06 and the cases which were full sized in my new redding die have little or no neck tension on the 100gn ballistic tips.

    bullets measure .257", expander ball measures .257"

    the sizing precess felt normal and i felt the expander do its work on the way out.

    the speer bullets which also measure .257" appear to seat with more tension - how wierd is that, although i only tried 3 cases as thats all the speer heads i had

    brass is RP and twice fired at most, with 53gn n160 under 100gn speer bullet. cases were tumbled before sizing and ultrasonically cleaned in h2o, fairy and vinegar solution after trimming to length.

    any thoughts ?

  2. #2
    Can you move the bullet in the neck by putting a bit of pressure on it or do you just find them easier to seat ?
    boat tail bullets will seat easier than flat base ones.
    Can you give us the sized case outside neck measurements before and after seating the bullets ?

  3. #3
    don't know if it is something that could cause this problem but have you checked case length? Have you also tried cleaning and setting up your dies again from scratch?

  4. #4
    Gary

    As an interim measure you could remove the expander ball and run the cases through the die again.

    Regards JCS

  5. #5
    You can pull them out with 2 fingers. Too slack to hunt with!!

  6. #6
    I think your brass is suspect.~Muir

  7. #7
    Quote Originally Posted by Muir View Post
    I think your brass is suspect.~Muir
    I was thinking that too, dies were cleaned before use and surely adjustment won't affect tension with redding A series dies? I've seen carbide expander balls advertised - are these any good - might order one with some new brass today.

  8. #8
    as above i think its the brass gary different neck thickness

  9. #9
    Quote Originally Posted by Offroad Gary View Post
    I was thinking that too, dies were cleaned before use and surely adjustment won't affect tension with redding A series dies? I've seen carbide expander balls advertised - are these any good - might order one with some new brass today.
    It really doesn't matter who made the dies or how they are outfitted if your brass is too hard. I am a little suspicious of the .257" diameter expander ball. If your brass is a bit arthritic it may be expanding the brass too much. Before you order a new ball, try spinning the current one in an electric drill and polish/stone the diameter down a bit. If it's .257" it won't be hurt by losing .0015" of diameter.~Muir

  10. #10
    100 new sako brass and a carbide button kit ordered!

    interestingly enough a steel button at the suppliers measured .2553 with a micrometer (my .257 was measured with an aldi vernier). they offered to replace the expander for me.

    hopefully problem solved

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