RCBS Summit

Discussion in 'Reloading Forum (All Calibers)' started by mike06, Jul 12, 2019.

  1. mike06

    mike06 US ARMY 1970-1977 Silver $$ Contributor

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    Last edited: Jul 14, 2019
  2. GAnderson

    GAnderson Silver $$ Contributor

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    Same here with my T7 press. I do know that the bushings are supposed to be matched to the specific head, so you should not interchange bushings with different heads...I verified this by putting another bushing in from another head and it had some play. I have 3 heads and they all have zero play/tilt with the bushings that were supplied with them originally.
    I have concluded that a lot of run out issues have to do with various bullet designs not matching the die seater stem adequately...basically the bullet gets seated off of contact with the tip rather than the ogive...and even then with bullet to bullet variances from lot to lot, runout can show up. Even had this issue come up with a Wilson inline seating die...sent it back to them and with dummy rounds and they corrected it.
     
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  3. mike06

    mike06 US ARMY 1970-1977 Silver $$ Contributor

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    My problem is in sizing the case and keeping the neck in concentric. The best method with the T7 so far for me is to use a body die or a FL Bushing die without the bushing the neck size in two to 3 stages to get proper neck tension. And yes I do use 21st century expander mandrels.
     
  4. GAnderson

    GAnderson Silver $$ Contributor

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    My bad...I thought I read that it was seated bullet run out.
    you probably already know this but I will ask... 1) are you using the expander button in the die? Dragging the case/neck back over the expander button can sometimes distort the neck concentricity. 2) are your necks turned at all? If neck wall thickness varies, you will never get them true.
    I "float" my dies nowadays and this has really been the best for me as far as neck concentricity.
     
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  5. mike06

    mike06 US ARMY 1970-1977 Silver $$ Contributor

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    Yes turn the necks don't use the expander ball any more. L.E . Wilson has the theroy of resizing the neck down -.003 below the loaded neck size and let it spring back a .001. I anneal every firing and after all the sizing I end up with .0015 to .002 neck tension. Also float the dies and shell holder.
     
  6. Ares

    Ares

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    If the time is an issue Grauwolf in germany have some of them in stock at times, quick and easy delivery and not a big difference in price.
    When your using 750 € or more plus shipping taxes etc, a few euros extra dont matter too much.
    That's where i got the first one the largest heavy version. The 120 mm would be plenty adequate for my uses but was'nt produced at that time.
     

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