For what you want it for, a 6-inch would be a great choice. I, too, have a 6-inch 686 no-dash, but if I were going to get a .357 for hunting, I'd look for a primo stainless steel Ruger Security-Six. It gives you the longer sight radius and the ability to quickly acquire a target. In other words, it's as light as a 686 4-inch, but gives you all the benefits of the 6-inch! That's why the Rugers was one of the most popular hunting handguns of its day. Underlug barrels changed all that, making .357s heavier, bulkier and harder to acquire moving targets with. They were great for range use, but if a bear or couger is charging, I'd take the 4- or 6-inch Security-Six any day!
I'm not about to sell my 686 6-incher, but if you were going to put me out in the field for three days of camping, hiking and grubbing, there's no doubt about the gun I'd take.
The one thing I'd change on my Ruger (and I've already changed them) are the aluminum sights. I'd take some of the money I saved by buying it and pick up some Millet sights and a good spring kit. You can even buy a lock, which is optional, not mandatory. ; )
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