I got a set of Black Diamonds on my reso, Ernie Ball 9's on the electrics and it's been so long since I changed strings on the Gibson acoustic I've forgotten what the heck I used last time. I get about three wraps on the wound strings and four or five on the unwound ones. One thing I learned, they seem to last a long time and keep tune if when putting the new ones on, pull the crap out of them at the twelfth fret until they no longer lose tune. It takes a while longer and I use an elcheapo electronic tuner to do it, but it works real well. I haven't broken a string in a long time on any of the guitars and I bend and twist 'em every which way. I used a set of John Bearse resonator strings once and they held up and were very good also, but are hard to find down here in South Fla.