Maybe it's just me but the 308WCF class cartridges seem a bit light for shooting a 1,000 lb animal at varying distances and angles. Yeah I know its been done a million times under the right conditions but I'd opt for more horsepower. The bulls that I've taken went down to a 338RUM.
This year I'll be looking to take a Maine bull in a heavily forested area. My ol' trusted 45-70 will be the rifle of choice and I'm working up a good 400gr load as we speak. Hopefully it will be "one & done".