The Lee Conicals don't move forward in the cylinder when the pistol is fired.
In my experience, the Lee Conicals are not as accurate as round balls, however IF I were planning on hunting with a pistol, I would definitely use a conical bullet.
I basically hate aluminum moulds because at casting temperatures, aluminum loses half of its strength.
Sue wish Lee would come out with a Premium line of moulds-identical to their aluminum moulds but made out of 360 Brass. Now, those moulds would be GREAT!!!!