taurus titanium .357
It's got the 6" barrel and it's accurate as well as VERY light to carry.
I have a 4" 41 Mag in the same gun. Got it specifically for the purpose you're asking about. Not claiming it's the best wheel gun ever made but the titanium trackers are a heck of a gun for packing. I believe Smith has a titatium 44 now too.
I have the Ti Tracker in 45acp.
Light, weatherproof, accurate.
4" barrel is optimum for open carry.
5 rounds of 45 acp is good to go.
BTW, some of the Ti Trackers are ported, some are not.
This influenced my decision (ports are LOUD)