This link concerns a blown up cast action Ballard at the Quigley match, but, it touches on the rolling blocks and other old actions. There is a lot of info in it concerning old actions;
http://www.assra.com/cgi-bin/yabb/Ya...m=1340046856/0
It's not too difficult to find info on Rolling Block strength issues. There is another thread there about a .308 win conversion that was on Gunbroker, basicaly a grenade waiting to happen.