Yeah, or even on both the sabot and the case. I wonder if it could be fairly deeply crimped on 4 sides of the case mouth so that would still leave a large surface area to headspace on, and upon firing the case would spread to complete the headspace. It looks like we also may have some slide cycling issues relative to the low recoil impulse. We may need to use a dual spring setup. ------------------ The only thing that should come between you, and any gun... is comfort... Get Agrip! Your first and best weapon and/or tool is your mind. Warning, anything I write is intended to manipulate you into using your mind.