According to the math, recoil is comparable to a med range .44mag load, 280g @1300fps gives about 16ft.lbs. of recoil.
With 100g bullets in the .243, and a max charge for 2600fps, you'll feel 16 ft.lbs. These figures are WITHOUT a scope.
Factor in the extra LB for the scope and mounts, less than "max" loads for 2500fps., and recoil is down to 12ft.lbs.