Vall,
Just so you know, you can do pretty good bore/chamber/throat "casting" w/o Cerrosafe or anything other than a just lead and a piece of brass, a good strong rod, tape, and a hammer.
I cannot imagine how many hundreds of rifles have been rebored by JES (I have one), but it's a lot. This is the only bad word I have ever heard about them. Clearly, a mistake was made, but I'd not so glibly condemn them either.
Springfield rifle company survived many people getting hurt by their 03 actions that so many here dearly love to death (no pun intended). That company survived their errors and I think JES will too. Apparently, JES learned from their mistake and much faster than Springfield did. The Marlin pump action shotgun (1897?) was/is another deathtrap waiting to happen. Marlin survived that for another 100 yrs.
I've had a rifle recase colored and roasted to embrittlement in the process. That could have been catastrophic, instead of simply ruining a valuable and rare action and wasting a lot of my time and money. THAT outfit DIDN'T learn, and they may be roasting other actions as well.
I am sure we could all name many more similar gun-related things like this.
At least the problem has been identified and is, presumably, being rectified. Let's hope everyone involved is satisfied and this outfit will run for another century or two.