I've only made 2 or 3 recurved elm bows, all were 60" t/t for 50# to 55# @26" all with dry heat/oil. All came out great and none pulled out.
If steaming, I think I'd give them a few days to dry out then set the recurves with dry heat or like Hamish said, add a laminated underlay to prevent them from pulling out. I've done the underlays on other recurves with success.