i figured out that if you trim some of the top of the detent off it helps with the pinching. allows the ball to fall further down into the breech instead of off to the sides. i rubbed mine against some soft sand paper to give it a slight curved top and to take the squared edges and to bring the height down some.
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CCM Works Sniper, Thumper, Kingman Hammer Low Pressure with Vertical ASA, TPX, Ion mech/closed bolt