I would get the exact weight of your rig, then add full fuel to the total. Add an appropriate amount for how much gear you'll have aboard. (It varies from Captain-to-Captain,) and come with a grand total. Then spec a lift with at least a 3K cushion in it's total capacity.
I have a Marlin 300 that weighs 12,500 loaded for Bear. I chose a 16K cap lift and I'm glad I did.
Others may say you can cut it closer, I dunno. I wouldn't, but that's my cautious nature. I'm sure Grady-White could get you the weight on your 247 and you can calculate everything else.