I have an encore with 7mm mag, 209x 50 and 12 ga slug. I also have a 338 Lapua AI that weighs 24 lbs with muzzlebrake.
I am not sure your shoulder would last long enough to site it in. Why not go with the 45-70, 450 marlin, 375 HH or 338 win mag if you want a brush gun.
BH