Re: soft hackles for brook trout? (not on swing)
Aside from swinging them, dead drifting them I had a lot of luck last year stripping them, almost like you would a streamer. It adds some nice action to the fly. The spring creeks I was doing this mostly hold browns but I'm sure we landed a few brookies with this method.
The brookies in high gradient freestone streams here in PA aren't too picky. When I fish these types of streams, I mostly use dry flies but always carry a few nymphs and streamers with me just in case.
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