I have made two out of White Oak, a mollie and a flat bow, the mollie 45@28 and the flat bow 39@28, I heat treated/induced reflex on both, and they still ended up with some set. 1.5" on the mollie and <1" on the flat bow. The mollie is obviously way more stressed, and I'm not the most perfect tiller-er so who knows, but they still shot pretty well! I also charred them pretty dark, scraped/tillered, then re-heated.