I've been carrying a S+W Md. 686 +(7 shot, 2 1/2" bbl. , . 357 mag. ) for about 4 years now as an off-duty weapon. No complaints, although I prefer a Ruger Redhawk in the winter months when heavier clothing allows for easier carry.
Never been much for the lesser calibers (9mm, . 38 spec,etc). We used to be issued the excellent SigSauer P226, nice weapon, crap caliber IMHO. We now carry the Glock 22 . 40 Cal. , which I like as a duty weapon, but would go back to a heavy caliber wheel gun in a second if they allowed for duty carry, I just seem to shoot them better, no matter what the barrel legnth is. I only carry one weapon while off-duty, with two reloads for same. On -duty, I carry 2 Glocks, one is concealed in a less than noticeable but easily reachable location. Never had the need for the 2nd one yet, hope I never do, but it's good to know it's there.
I prefer the W-W 145 Gr. silvertip for the . 357 mags, though there are a ton of good ammo choices for that caliber, just my preference. We carry the re-badged 'Talon' rds. for the . 40 while on duty. I would prefer Cor-Bon, but the cost scares the crap out of the admin, so we settle for less. We are also issued the Glaser Safety slugs for destroying wounded wildlife in the more 'residential' neighborhoods, though I usually just choose the 12 Ga. with buckshot for that task.
If I am carrying the Redhawk, Federal's Hydroshock's rule IMHO.
Scott W.