Can I ask what type of loader you used? I've experienced the same problem with a MEC 9000h,but when using the same wads on grabber there were no problems.I suspect it was because the grabber cycled more slowly.I will explain why I think the Purple Jammer inferior.
When I got back into reloading those were the 1st wads I tried.
I used AAHS cases. When I rammed in the wad and dropped shot the wads would pop back out sending shot all over.
I learned from others why. There were no air release grooves molded into the piston like other wads.
The CB 4100 has them. I don't need that aggravation of dealing with that oversight on those Purple Jammers.