I going to assume the CCI41s are the same cup as the CCI450's which are 0.025 inch (the thickest cup in small rifle). They are stout. I bet you could set off Federal or Winchester small rifle primers in a stock Shadow 2, they have ~0.020 inch thick cups. Know for certain I can with my heavy sprung TSO's (running 26lb main springs).
Cheers,
Toby