Brian thanks! I have given it 3 oven treatments at 275, the wood started to dry out and crack so I stopped there, I think I have taken it as far as I can. Maybe one more soak and oven treatment.
Most kiln drying for hardwoods is done at around 175 degrees F, so 275 F is certainly going to be too high, and is going to cause cracking and excessive moisture loss. Imagine what would happen if you had gone even higher to 300 degrees F as recommended.
I agree with what Kutter said. Patience is needed when de-oiling a stock. It took many years, maybe decades for the oil to seep deep into your wood. Trying to get it out in a weekend project by using too much heat and harsh organic solvent soaks is likely to damage the structure of your stock. Here's some more tips from one of the many stock de-oiling threads.
https://www.doublegunshop.com/forums/ubbthreads.php?ubb=showflat&Number=482182&page=1
