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180 gr berrys, 8.3 gr pp=keyholing(sp?)

Discussion in '10mm Reloading Forum' started by xdmikey, Dec 3, 2010.

  1. xdmikey


    Dec 5, 2009
    Cypress, TX
    this is a start load and hits all around the bullseye.
    any ideas? bad barrel?
    besides it's time to get some aa#7 and lead bullets and try a new combo?
  2. _The_Shadow

    _The_Shadow Ret. Fireman

    Jul 23, 2007
    Southeast, LoUiSiAna
    Have you checked to see if you maybe over crimping those? You might want to slow them down a little as well to see if the problem goes away!

    Plating on the bullets is very thin and will shear off causing problems!

    Good luck!

  3. xdmikey


    Dec 5, 2009
    Cypress, TX
    thanks for posting.
    that's just it-it's a start load!
    i did think about the overcrimp. i didn't blow through all my loads so i can pull the bullets w/a hammer puller; that should keep the bullet in good shape for checking the crimp, right? every time i've used this for pulling berrys for no primer/backwards primer the bullet comes out w/barely a line at the crimp. btw, i'm using a fcd.
    i planned to pull them anyway and go w/another powder.
    i'll post back on this.
  4. xdmikey


    Dec 5, 2009
    Cypress, TX
    'Shadow, i pulled 5 and saved 5 for measuring.
    the pulled bullet looks a little dented but measures .40.
    the complete cartridge(from troublesome batch)measures .42.
    the 8.3 of power pistol is the start load, which i won't use any more for 10mm w/plated bullets.

    the whole point of my starting this post was because i've read about keyholing but had never had it happen to me. now it has. i've found you guys and since i'm a why t.f. kind of guy i thought i'd ask for help.

    thank you 'Shadow.
  5. Spoklahoma


    Dec 26, 2009
    Which reloading manual are you using? I just started working up a 180 gr JHP with Power Pistol (I assume that's what you mean by "PP".)
    According to my Lyman manual for a 180 gr JHP the starting load is 7.2 gr and the max load is 8.0. So far I've loaded 7.2 and 7.5 with good results.
    My manual doesn't have a load for 180 gr cast bullets, but for 175 gr cast they suggest 7.3 to start.
    I think you should try loading a few at 7.2 to see how it goes.
  6. Taterhead

    Taterhead Counting Beans

    Dec 13, 2008
    Boise, Idaho
    I've shot thousands of Berry's 180 gr plated bullets. I have good results, but I had some issues initially with them. I would not give up on them without first trying a few modifications.

    Make sure that you are not using data for jacketed bullets. If you are, you may be a little hotter than you might think. Use lead data or back off jacketed data by 10%. If 8.3 grains is a starting point for jacketed, then you should back off to about 7.4 gr for plated bullets.

    A couple of other things that fixed keyholing for me was to 1) load them all the way out to 1.26", and 2) seat and crimp in separate steps. Crimp just enough to barely remove the bell and to permit reliable feeding.

    I run these through a G20 barrel, and they are good performers @ about 1050 fps.

    Good luck. I think you should be able to get these to run right.
  7. xdmikey


    Dec 5, 2009
    Cypress, TX
    Thanks for the responses. I'll have to doublecheck but I'm pretty sure of the 8.3 start load.
    After some surfing I found the load of 5.6 of 231 for my plated 165 raniers. As suggested I started at 5.0 and ended at 5.6; great load for paper(and the cousins!).
    Will probably be switching to lead when these are done.
  8. xdmikey


    Dec 5, 2009
    Cypress, TX
    Per the Lee manual: power pistol w/180gr plated bullets, start load is 8.3 grains.
    Didn't work well in my g20; ymmv.
  9. steve4102


    Jan 2, 2009
    I think Lee has some bad info for you here. According to Hornady #7 180gr Jacketed has a Start of 6.8 and a Max of 8.4gr, Lyman 48 lists 180gr jacketed as Start-7.2gr and Max-8.0gr. Your 8.3gr is right at the top for jacketed, to much for plated.
  10. xdmikey


    Dec 5, 2009
    Cypress, TX
    i knew something was skewed but i didn't like the way it was looking so i came back here and found 5.6 of 231 w/165 ranier. i worked up to it and love it.
    i'll keep the PP for my 40s.