9mm need taper crimp ???

Discussion in 'Ammo & Reloading' started by oldbrass, Aug 14, 2013.

  1. oldbrass

    oldbrass Well-Known Member

    1,362
    0
    During the last range session on Fort Lewis there was a bunch of 9mm brass left in the barrel so I figured I`d start loading it. My manual sais it head spaces from the case mouth and to roll crimp "as needed" so Has anyone had a need to crimp there 9mm ??? I`ll be loading 124gr FMJ
     
  2. SWO1

    SWO1 Well-Known Member Lifetime Supporting

    2,866
    41
    Most all AUTO pistol ammo is TAPER CRIMPED if at all. Just make sure you remove all case mouth flaring prior to seating the bullet. Bullet setback is most always caused by this not being done properly. If you do taper crimp Lightly should surfice. Notice revolver rounds have a canalure for roll crimping, .38, .357, .44, ect. .9mm, .40, .45 do not.

    Rule of thumb.....Roll crimp Auto rifle.....No crimp auto pistol
    No crimp bolt rifles......roll crimp revolver pistol. I know seems Half-A$$ akwards...:confused: