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problems with LEE seating die

Discussion in 'Handloading and Reloading' started by xd9, Nov 1, 2009.

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  1. xd9

    xd9 Member

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    Hey guys I just loaded my first 10 rounds and I am having problems with the consitency with the seating die. I am trying to get a depth set at 1.120 and I can get one set at 1.120.5 but the next round I seat seems to seat at around 1.114-1.116 I was wondering what would cause that and if any one had the same problem.
     
  2. R.W.Dale

    R.W.Dale Member

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    what bullets and cartridge are you loading for?

    .006" is not unheard of for bullet length variations. Remember bullets seater contacts the bullet partway down the Ogive and not on the tip. I'll wager that if you used a bullet comparator your seating depth would measure out much much more consistently.

    Or to put it simply it's not the bullet seating that varies but the bullets themselves. Any seating dis can only be as consistent as the bullets you're using
     
  3. Lee Roder

    Lee Roder Member

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    What are you loading? If handgun, then your seater most definitely pushes straight down on the "tip", at least with flat wadcutter-like points

    Maybe you are beginning to accumulate "crud" in the die, things like bullet lube, ...?
     
  4. R.W.Dale

    R.W.Dale Member

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    It depends on the seater and bullet. For example I have 3 seaters with my 38spcl dies and only the wadcuttet seater plug would contact the bullet nose squarely. The HP and RN seaters both seat off a point partway down the bullets ogive
     
  5. Lee Roder

    Lee Roder Member

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    well, i just took a lead RN bullet i pulled (i odn't load them), and took a round nose seater out of an rcbs die and pushed and twisted it onto the bullet's "ogive" to see where it set. the only mark the seater made was at the very tip of my bullet. perhaps my bullet was improperly shaped, it's from serbia. :neener:
     
  6. Otto

    Otto Member

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    Tolerances of .006" ain't nothing to lose sleep over. I've seen much more variance in WWB 9mm. Even my Redding competition seating die varies by a few thousandths.
     
  7. jcwit

    jcwit Member

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    Nothing to get worked up about. A std sheet of Magazine paper is .003 thick, you're talking about 2 pieces of paper.
     
  8. 243winxb

    243winxb Member

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    Seating depth variations from Lee.

    .005" to .010" is common.
    http://www.leeprecision.com/cgi/faq/index.cgi
     
  9. Walkalong

    Walkalong Moderator

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    Some of it just depends on the bullet and its fit to the seater plug. I would not be happy about that big a difference, but some combinations will do that. Is everything tight and clean? If it shoots good though, I wouldn't worry to much about it.
     
  10. rfwobbly

    rfwobbly Member

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    I agree .006" is nothing. It could be....

    • Seating the bullet by pushing on the sides rather than the tip
    • Bullet lube built up inside the die
    • Differing press handle techniques
    • A progressive press that uses a single die holder will rock the holder if all cartridge positions are not being used

    What really matters is the variation over an entire run. That is, the difference between the longest and shortest loaded cartridge after making 50 or more rounds. That's the number to remember.
     
  11. ranger335v

    ranger335v Member

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    Seating variations come from inconsistant press operation, widely varing case mouth thickness or misadjusted crimping, not a die.
     
  12. xd9

    xd9 Member

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    Hey sorry I havent answered any questions yet. I am loading 9mm and this is the first time I have used this die, the reason I am worried is becaise I read somewhere that if you seat the bullet lower it causes a huge diffrence in the pressure in the case which could damage the gun. Also I am using magnum primers because they are the only ones I could get my hands on, and I am using blue dot powder which most people dont seem to like just a little nervous is all. thanks for all of youre guys help.
     
  13. Walkalong

    Walkalong Moderator

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    In previous threads folks with the Lee dies have tightened up the O.A.L. differences by just getting everything snugged up. That O Ring will flex differently from round to round depending on neck tension differences if the die is not snugged down well.

    .005 is not going to make anything go boom on any reasonble load. Speers caution in their manual talks about a much bigger difference. .030 or .060 IIRC.
     
  14. helg

    helg Member

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    Blue dot is slow (and safe) powder for 9mm. Even if you fill the powder to 120% of the volume under bullet (it is named 20% compressed charge), and seat the bullet to make OAL by .1" (not .006" like you said, but full .1") shorter than the max, chamber pressure is still about 60% of the maximum allowed for the caliber.
     
  15. Noveldoc

    Noveldoc Member

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    Some could be technique. There is a certain kind of crunchy feel with my Lee dies when the bullet is seated all the way home. Just takes a little practice and muscle memory to find and keep this setting.

    Tom
     
  16. ranger335v

    ranger335v Member

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    "That O Ring will flex differently from round to round depending on neck tension differences if the die is not snugged down well."

    I don't see how that can be. The O ring serves to push the die UP, taking out any slack in the threads, and so does the effort to both size and seat. ??
     
  17. Walkalong

    Walkalong Moderator

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    Perhaps you are right. I do know folks have posted here about excessive O.A.L. variences and snugging the dies down helped it out.
     
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