Why bother, don't they have a life time warranty?
It's the calibre of the shooter that counts not the calibre of the rifle.
Email RCBS, they are very good to deal with.
Cheers guys I will give that a try
Oh dear. That's not, the OP, good news. Bad luck! I've used an RCBS for over twenty years and never had the problem. Where is the crack do you have a picture?
The real BE AWARE with these is to make sure that the arm that you pull down to work the ram is held tight fast into its hole in the bottom block. Always, always, always. If you don't you will get a crack in that area more likely as not, if unlucky, under heavy duty full length sizing of high pressure rifle cases.
Just heard back from RCBS they are happy to exchange broken part free of charge, unbelievable service.
Shame they are in the States!
Thanks to those who replied.