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Taper or roll crimp for .45acp?

Discussion in 'Handloading and Reloading' started by Nowhere Man, Oct 19, 2011.

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  1. Nowhere Man

    Nowhere Man Member

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    Does one work better than the other or doesn't it matter?



    Dave
     
  2. EMC45

    EMC45 Member

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    .45ACP headspaces on the casemouth, hence the need for a taper crimp. If you are using it in moonclips in a wheelgun I guess either would work.
     
  3. HOWARD J

    HOWARD J Member

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    There are a lot of people on this forum that feel that a taper crimp die is not necessary as on a 45 acp the case only needs to be folded against the bullet (no roll crimp) but you use a roll crimp die to do it--therefore a taper crimp die is not necessary as it is relatively new.
    That is what I was told by many people when I said I wanted a taper crimp die for a 45 acp.
     
  4. cfullgraf

    cfullgraf Member

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  5. Super.45

    Super.45 Member

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    When I first started reloading my original RCBS 3 die set featured a roll/seat die and this is the way I loaded all my .45 acp rounds for my Series 70 pistol and they worked fine. I put just a slight amount of roll on the case mouth.

    When I switched to a progressive press the setup was a seperate seat and taper crip die which I think works better with match grade chambers that are tight.
    I seat and crimp my rounds to .469 at the case mouth and have no problems in my Les Baers.
     
  6. 340PD

    340PD Member

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    I taper crimp, in a separate step, every round I handload including light .357 loads. Never an issue with any of them.
     
  7. mnhntr

    mnhntr Member

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    Lee Factory Crimp Die
     
  8. Walkalong

    Walkalong Moderator

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    RCBS was doing it in the early 80's (81/82), if not sooner.

    A light taper crimp is what a .45 ACP needs. I set my crimp die so all the shortest brass gets the bell completely removed, and the longer ones end up with maybe .001 crimp.

    Some folks shooting guns with moon clips do roll crimp. That can be done because the case is headspacing on the moon clips.
     
  9. cfullgraf

    cfullgraf Member

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    Interesting.

    Must of happened shortly after I ordered my 1981 RCBS taper crimp die. This die is not threaded to accept a seater. As i remember, ordering a separate taper crimp die was the only taper crimp die option I had at the time. But, i've slept since then.

    Also, I will admit that I did not shop for any auto pistol dies again until the nineties so i could easily miss such an introduction.

    To bad RCBS does not date dies any more.
     
  10. rcmodel

    rcmodel Member in memoriam

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    The first set .45 ACP dies I bought in 1962 included a steel sizer die, and taper crimp seater die. Or at least they closed up the case mouth bell however far you wanted it closed up.
    They were Herters dies.

    The Carbide RCBS dies that replaced the Herters has a taper crimp seater die.
    They were bought in 1980.

    I seriously didn't even remember when auto pistol seating dies didn't do a taper crimp.

    rc
     
  11. Red Cent

    Red Cent Member

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    At the expense of costing RCModel another post, what MNHTR said. I use the die for the 9MM and the 45acp. I use a roll crimp for the revolver rounds.

    The die does cover up inattention to loading (thought the word sloppy to severe :) )
     
  12. EddieNFL

    EddieNFL member

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    More than three decades ago, when I was a no rank, no money GI, I used a size die to apply a taper crimp.
     
  13. HOWARD J

    HOWARD J Member

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    Just this year Hornady finally came out with a tapercrimp die supplied with
    their auto pistol die set.
    Up to now you had to purchase the tapercrimp die at extra cost for each
    auto caliber.
     
  14. Hondo 60
    • Contributing Member

    Hondo 60 Member

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    +1 to what EMC45 said.
     
  15. PO2Hammer

    PO2Hammer Member

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    I use a taper crimp die adjusted to give no crimp, it just bumps the case mouths, eliminating any flare from seating or case mouth dings from the brass hitting the ground.
     
  16. ArchAngelCD

    ArchAngelCD Member

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    A taper crimp for ammo meant for semi-autos, a roll crimp for revolver ammo.
     
  17. Nowhere Man

    Nowhere Man Member

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    Anybody have a sise-by-side picture?

    Dave
     
  18. Walkalong

    Walkalong Moderator

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    I haven't roll crimped any .45 ACP, but here is a taper crimp.

    It is .471 at the case mouth & .472 under the crimp mark where the bullet is seated..

    [​IMG]
     
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