I bent an RCBS one on a rock one time. Last year, after like eleventy Zillion (or at least 50-75,000) I broke my Lee universal decapping die pin on of all things a Berdan-primed .308 case. Made me madder than a wet hen and I promptly bought two spares from Midway.
Several things I dislike about RCBS dies, mainly their nitride-coated stuff has such a hard finish that it won't stay tight unless wrenched, and then it seems like ten times as much force is required to break it loose again which means Bubba and his Vise Grips ruin the knurling.
I have a piece of rosined leather and a small pair of Vise Grips that ger used for unscrewing S&W cylinder pins...and tightening RCBS expander balls. Good thing is if you do break a pin, you can rob one from any other die set until you can get to Cabelas and buy more along with a 25-20 Marlin.