Originally Posted by NVhntr
Originally Posted by grovey
cci 400's shouldn't be used in anything that operates over 40,000 psi, but I've used them in a pinch too. 450's, br4's and 7 1/2's are tougher, and will crater less than the thin cupped 400's.


Source?


http://www.sksboards.com/smf/?topic=56422.0