Interesting thread.
I have five revolvers in .357 - they all have a "mission profile". Between a home in the suburbs and a cabin in the mountains, they serve as a nightstand gun here, nightstand gun there, vest gun, office gun, trail gun. None of the revolvers are simply a just-to-have gun and staying within the same caliber has simplified ammo management.
I've been wanting a little diversity while hiking, hence the initial post. But, this weekend, while hiking solo in the Sierra above the timberline - and with a Blackhawk on my mind - I thought more stopping power would be a good thing. So, I bought a Blackhawk 4 5/8" in .45 Colt. For hiking, the weight-to-caliber just seems to make sense when loaded heavy.