Bought a 250' roll of 12-3 rx about 2 months ago. Used it for home runs to kitchen and upstairs baths. Stipped and crimped at boxes but left as is at panel. Used the remaining 50 ft. or so on an upgrade last week. During change over, as i was stripping at panel noticed peeling and cracking on the outer sheathing of both black and red wires. The black was splitting so bad that i saw copper.. Luckily I was able to redo those pulls. I checked the rest of the coil, and sure enough the same. Then I remembered using that coil at the house, which has already been rocked, skimmed and half painted. Checked at the panel and saw the same. I am in the process of contacting southwire to make sure they know of the problem, and get compinsated for pulling new cable. Just wondering if anyone else has had this problem. Here they only require you to strip/crimp at devices, not at panel for rough. I think from now on I will do it at both, for my own piece of mine..