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.223 bullet seating depth variations

Discussion in 'Handloading and Reloading' started by ochadd, Oct 27, 2009.

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  1. ochadd

    ochadd Member

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    Every round I load has a different OAL. Sometimes it's up to .02 off from round to round. Measuring from the tip to the bottom of the case using calipers. I understand it seats from the ogive on the bullet but can this change that much from round to round? Not sure how to accurately measure that.

    Using a Rockchucker press and Lee bullet seating die. I've tried screwing in the die a little further, tightening the lock nut with a pliers, and measuring the bullet length prior to loading. The bullet adjustment knob wiggles a little and I'm wondering if that's normal.

    Last night I was trying to load at 2.232 using 55gr Sierra FMJBT gameking bullets and out of the 20 I loaded there was a spread from 2.21 up to 2.233. Hornady Vmax, Nosler BT, Remington SPS bullets, they all vary allot from round to round.

    Loading 9mm it is dead nuts every round.
     
  2. Canuck-IL

    Canuck-IL Member

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    The variation in gross OAL is not unusual, especially with FMJs - very poor tip uniformity.

    You should measure from the ogive with a tool such as the Stoney Point device now sold by Hornady.
    /Bryan
     
  3. matrem

    matrem Member

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    I'm more than a bit surprised by the .023 with the Nosler Ballistic Tips & Hornady V-Max!
    Hmmm?
     
  4. billybob44

    billybob44 Member

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    You answered your own question.

    9MM-exact-.probably all other STRAIGHT wall case-exact. The bottle-neck case of a .223 will vari in length. Did you trim all your brass to exact length? Are all of your cases of the same mfg. and times shot? Unless you're Bench Rest shooting .002-.003" is not going to make a difference on your groups. Don't "Beat Yourself Up" on your handloads:banghead:=they will probably be GREAT:D
     
  5. matrem

    matrem Member

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    "The bottle-neck case of a .223 will vari in length."
    ?
    I understood him to be talking about OAL.
     
  6. 243winxb

    243winxb Member

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    What LEE die set do you have? A variation of .005" to .010" is normal. Your is to much as you know. From Lees website.
     
    Last edited: Oct 27, 2009
  7. 243winxb

    243winxb Member

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    You do not need to crimp, your choice. Just dont screw the die in to far. http://www.leeprecision.com/cgi/faq/index.cgi Seating die crimp style

    There are two crimp shoulders in our bullet seating dies. The first shoulder applies a slight taper crimp and the second shoulder applies a full roll crimp. The closer the die is adjusted to the shell holder the heavier the crimp will be.
     
  8. JimKirk

    JimKirk Member

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    Drill a 7/32" or 13/64" hole in a piece of steel, place the loaded round bullet first into the hole(upside down). Now measure the difference between the rounds(I use the rod that extends out on my caliper). This does not tell you the OAL, but will show if your die is seating the bullets to different depths. By the way this is a poor(or cheap) man's bullet comparator. Really the hole size does not matter as long as it is small than bullet diameter and larger than the bullet tip ....anywhere along the ogive.

    Jimmy K
     
  9. ochadd

    ochadd Member

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    The die set I have is the Lee Deluxe three die set. I'm not crimping them as it's for a bolt gun.

    Don't reload for competition but I'm an obsessive perfectionist. The bullet comparator sounds like exactly what I need. Making the perfect round is as enjoyable to me as shooting it.

    Sounds like the Hornady set is the best buy unless there is a better recommendation? THR rocks.
     
  10. Seedtick

    Seedtick Member

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    While this trait is often irritating to those around you, it is beneficial for someone who reloads.
    That's the way I see it anyway.

    ST
     
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