I'd not think twice about using a 7mm Mag for hunting brown bear. I'd probably be in 175 NPT mode, as in my experience it creates a wider initial wound channel than the TSX does on average and that NPT offers more than ample penetration for bears.
I had a hunter with me last year miss an easy opportunity on a B&C class brown bear, due in part to the fact he'd bought a "bear rifle" for this trip. I encouraged him in preparation of the trip to bring his "deer rifle" with specific ammo, but he was certain it wasn't enough gun. He'd fired the "bear rifle" less than 40 times when he arrived in camp and was ill prepared for the hunt as his poor shooting displayed. I stress proficiency over power, but it seems machismo normally wins out.
