I’ve recently gone through a stretch of unstable lumber from various different sources. All the lumber reacted the same way when cut. Right before finishing the cut with the blade the lumber would *POP* releasing tension and cupping the wood instantly. I thought it would be a good learning opportunity to see what was going on.
My research indicated case hardening or tension set. I thought it was interesting so I made this video. If you have more to share on the topic, have a correction to something I said, or simply want to tell me that the Detroit Lions will never win a Super Bowl then feel free to leave a comment. Have a good day.
Test for case hardening in lumber: https://www.popularwoodworking.com/woodworking-blogs/how-to-test-for-case-hardened-lumber/
Post I was reading in the video: https://www.woodweb.com/knowledge_base/Case_Hardening_Explained.html