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Lee Factory Crimp Die?

Discussion in 'Handloading and Reloading' started by Parks2055, Mar 29, 2012.

  1. Parks2055

    Parks2055 Well-Known Member

    Hey Folks - Quick Question.
    Is the Lee Factory crimp Die a Roll Crimp or Tapper Crimp?
    I thought is was a Tapper crimp, but just read a forum were a guy said it was a Roll crimp?
    On the topic - What is best for 40S&W?
    And is Roll Crimp better for Revolver rounds?
  2. Jeff H

    Jeff H Well-Known Member

    Depends on the caliber. For 40S&W, it would be a taper crimp.
  3. Parks2055

    Parks2055 Well-Known Member

    Ah - I see. Each caliber will come with the approprriate FCD.
  4. rcmodel

    rcmodel Member in memoriam

    Auto pistol calibers headspace on the case mouth, and you must use a taper-crimp to preserve a case mouth for them to headspace on.
    Auto pistol calibers shot in a moon-clipped revolver could be roll-crimped as the clip would set the headspace..

    Revolvers use Roll-crimp to keep the bullets from pulling under recoil.
    A taper-crimp could be used in light recoiling target loads.

    Lee provideds the correct crimp for each caliber in the seating dies, as well as in the FCD.

  5. W.E.G.

    W.E.G. Well-Known Member

    I thought the Lee "factory-crimp" die was just a pinch-collet arrangement.

    So, neither a conventional taper crimp, nor a roll-crimp.

    Isn't it actually a simple SQUASH-crimp?
    The more you turn it down, the more squash the collet-fingers appy?

    If the Lee die can provide the roll-crimp element too, wouldn't it need some sort of lump-shaped shoulder on the collet-prongs to accomplish this?
  6. jcwit

    jcwit Well-Known Member

    The question arises,

    Are we referring to FCD in handgun calibers or FCD in bottle neck rifle calibers?
  7. cfullgraf

    cfullgraf Well-Known Member

    The OP is talking about 40 S&W so handgun FCD.

    Rifle FCDs are "squash crimp".

    Handgun FCDs crimp in a more conventional manner with the sizer ring.
  8. Walkalong

    Walkalong Moderator

    The FCD for straight walled pistol calibers is not a collet type. It will come with the appropriate type of crimp, either taper or roll. Case lengths need to be reasonably close to each other for consistent crimps.

    For bottle necked, and perhaps straight walled, rifle calibers, the FCD is a collet type crimp die which is oblivious to case length.

    The .357 Sig is a pistol caliber, but is bottle necked and the FCD for it is a collet type.
  9. unknwn

    unknwn Well-Known Member

  10. mingansr

    mingansr Well-Known Member

    as usual, take the advice and knowledge of RCMODEL. of course, the others have good thoughts too. good bunch here
  11. chhodge69

    chhodge69 Well-Known Member

  12. Walkalong

    Walkalong Moderator

    For the Carbide FCD that this quote is from, this is total BS. I believe it gets a lot of new reloaders in trouble. We are always having folks over crimping and asking what is wrong. (Yes, with other die brands as well.)

    While the o-ring set up has some flexibility, and case length is not quite as critical as with a crimp ledge that is built in to the body of the die, you most certainly can screw it down too far and buckle/ruin cases.

    They should be more clear in their statements.
  13. GLOOB

    GLOOB Well-Known Member

    I figured they meant it was impossible to buckle a case outward, so as it won't chamber. Yeah, you can overcrimp it, but it'll still load and go bang. If it fits in a finishing die, it'll fit in your chamber. Which is always a good thing, except when it's not.
  14. Walkalong

    Walkalong Moderator

    It can buckle it outwards, the carbide ring just mashes it back. :D
  15. mdi

    mdi Well-Known Member

    FWIW; I had a Lee FCD for .44 Magnum and used it once. I shoot 99% cast bullets and the FCD swages down my cast bullets so they are too small and lead the barrel. I fixed it though; I punched out the carbide ring and use the die for roll crimping only! For my 45 ACPs, I have no need to post-seat-size my ammo, as my reloading methods result in no chambering problems.

    I believe a new reloader should learn how to reload properly so there is no need to "fix" their reoads to chamber properly...
  16. James2

    James2 Well-Known Member

    I have no need and no desire for a Lee FCD. I suggest you put that thing in a dark spot and forget you have it.

    Seat and crimp with the die that came with your die set. This is the way to eliminate all the problems caused by the Lee FCD.
  17. Sport45

    Sport45 Well-Known Member

    What problems are those? Every pistol FCD I have puts a nice crimp on the round and the sizing ring barely kisses the brass if it touches it at all.
  18. Jeff H

    Jeff H Well-Known Member

    You must not shoot lead bullets. If you did, you probably wouldn't make that statement.

    But, they do crimp nicely. Of course, the regular seating die crimps nicely too.
  19. jcwit

    jcwit Well-Known Member

    This is just what I did. One day the kids will go thru the stuff in the back of the drawer and say, Wonder why Dad had this and never used it.

    The Lee FCD does fix all the non existent problems.

    So true, so true!
  20. Sport45

    Sport45 Well-Known Member

    My handgun shooting is 95% or more done with cast bullets. For all practical purposes the sizing ring in the FCD is the same diameter as the chamber. If the FCD was squeezing the round enough to swage the bullet the cartridge wouldn't have fit in one of my chambers anyway.

    Okay. They might fit in the chamber of my .45 Redhawk, but .45 Colt chambers are very large anyway. Bullets sized for the throats of that gun are no problem at all in the FCD.

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