Broke new piston ring...help.

Same thing happened to me a few weeks ago with a 2nd ring, on the last piston, if it makes you feel any better. For what it's worth, if you're using moly rings, you can get a set of non-moly ones because the 2nd ring is the same anyway. I'd send you one of the 5 extras I now have, but they are 0.030" over.