Hi - My name is Walt and I have a problem. I have a nice left hand Winchester model 70 action with 0.480 bolt face. I have an absolutely stunning exhibition grade walnut stock to put it in. My problem is what cartridge to use. I already have hunting rifles in, 223, 243, 6XC, 250AI, 6.5-284, 6.5 Creedmoor, 280AI, 308, 30-06, 300WM, 375H&H. What do you suggest?