It seems to be more a function of "grab" rather than brute

by John K., Sunday, June 02, 2013, 13:23 (4137 days ago) @ Charles

force. As mentioned, the hard plastic skin + radius at just about every approach angle tends to deflect round nose bullets. They skitter left and right and wallow around on the table unless well hit on centerline. Your SWCs would be a good choice if they have well defined shoulders.

I wouldn't go under 950fps. 45acp @ 850fps is notorious for bouncing back from hard surfaces. Hard maple covered with hard plastic will shoot back, especially when the pins get chewed up some. Enforce eye protection rules - bullets bounce off those pins at odd angles...