on a strat?
Fender Bullets. Maybe it's psychological but I could swear the first time putting bullets back on after using regular Fender, D'Addario, EB, GHS, Elixir, Cleartone, and DR, I noticed a small improvement in sustain and a bit "bigger" sound. To me it makes some sense, the bullet end really does fit snuggly in the trem block with increased surface area and much more mass in direct contact with that block. I dunno. Maybe I just bought the marketing idea behind bullets and I know I always enjoy that "new string sound". But if you find something you feel works for you, do you change it, or experiment? For a while I'm done experimenting.