Taurus 82 issue

New to the forum, first post..returning to firearms after about 15 year hiatus. Taurus 82, bought new, initial 200 or so rounds, no issue..nice shooting gun. Accurate, comfy in my hand BUT last 50 or so. Load gun(white box Winchester)..2-3 rounds no problem(both SA and DA), then gun 'jams'. Cannot cock or pull trigger..Open cylinder normally, out-in a few times and then OK..Took home and cleaned but haven't tried to shoot it again yet. I DID notice cylinder release button kinda 'wiggly'(screw tight tho)...Common? Any ideas?

Thanks in advance.