Because of OSR. (Over Stressed Rifleing).
There is credible reports of the barrels showing the rifleing on the OUTSIDE of these thin barrels after fifing monometal bullets thru them. I won't chance my valuable rifles when there are so many other premimum bullets available.
If you're in a lead free zone of California where mono's are the law.... The vote your elected representives out and change the stupid law.
(Sorry to sugar coat it.)
Side note; Hoser the origionator of this thread either sold or was selling his Chapuis because of this law and mono's.
The only problem I was ever aware of was the one with A-Square bronze monolithic solids about 15 or so years ago. That was a problem briefly with some English doubles but I've never heard of any others.
