straight walled pistol cases dont need roll crimps unless the bullet your loading has a cannelure. just use a taper crimp die to straighten the bell from the expander back into spec.
roll crimping a non-cannelure bullet will actually loosen the bullet in the case and cause fail to fire or go into battery as rimless straight wall cases headspace off the case mouth.
lee factory crimp dies are supposed to indent a noncannelure bullet and give it a factory style crimp. im not convinced its a needed or desired thing on non-cannelure bullets.
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"Gun control: The theory that a woman found dead in an alley, raped and strangled with her panty hose, is somehow morally superior to a woman explaining to police how her attacker got that fatal bullet wound." — L. Neil Smith
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Roll crimp on 9mm makarov?
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