Good luck! Dies are generally very tough things, much tougher than any brass case. The only thing that very occasionally breaks on them is the decapping pin. Really hard to imagine what broke?
One way to help set the decapping pin depth correctly is to
first set the die body to correct depth- usually just deep enough so a fired case fits, friction free, into the chamber after being sized in the die at that depth.
Then with the die body set there with the lock ring, raise the ram with shell holder all the way up. Screw down the decapping pin until the pin's tip is about level to where the base of the case would be in the shell holder. Lock the decapping pin there.
Good idea to clean fired brass with a rag or paper towel with something like acetone first, then apply an even coat of case lube. I use a roll-on pad with RCBS lube rubbed in with fingers plus a small amount of Imperial Wax rubbed in also. After some number of case lubings I'll add a little more lube and Imperial Wax if I notice the lube quantity is getting marginal. Light even roll of case on lubed foam pad- not too much, not too little... just right
Experience will help determine amount. The last thing anyone wants is a stuck case!!! Would rather have a little too much lube where the worst that happens is an occasional small shoulder dent. Inside neck brushing with a dry lube, like mica, will help ease the neck expanding operation. Then lastly with rag or paper towel and acetone, remove excess lube from case.
