RE: Dyna 97 bow strings??
I prefer 450+ just because I' ve used it for so long and feel comfortable with it. For older bows coming into the shop we have been using the Dynaflight 97 on them. 450+ is made with 12 strands and basically doesn' t give where the 97 we make 16 strands and it will creep some (though I haven' t found it to that much). Seems to give a " softer" shot.
I still change mine every year so would do the same whether it is 450+ or 97. Would think that a quality made string of 97 would last a couple years (with care).