If they are built for FF type strings,any of the newer FF type strings will be fine.I shoot D97,450+ and 8125 in low strand counts with no problem.I have been shooting 8 strand D97 on my bows 58# and under,they are quieter then when using 12 strands.I been using 6 strand 450+ on a couple of bows,450+ makes a pretty quiet string too.D97 is the least expensive I've found of the newer strings.Just got the 8125,but haven't played with it yet,but soon.I do pad my loop ends on my low strand count strings.I feel it makes the string a larger diameter to better fill the strings grooves and helps to quieten the bow.