I've used Meyer Hatchery's guide to raising Cornish X in the past and have had a lot of success. https://meyerhatchery.zendesk.com/hc/en-us/articles/360055407371-Brooding-Cornish-Cross-Broilers-101-How-to-raise-from-hatch-to-processing
With my current batch of CX though, I am using a very...