On their new basses (34" scale), Alembic provides a .128 round wound. Literally, for the first few years, I lived with this gauge. Hey, it was all new to me, anyway! Unable to obtain Alembic strings for a brief time, I tried the D'Addario Half Round XL's, which provided a .130 gauge B. I liked this even better! Finally, I've kind of settled on (don't hold your nose, everyone!) D'Addario Chromes, a true flatwound, which has a .132 gauge B!! And I find it excellent! I try to keep the action as low as possible, and so far, no problems at all. Your mileage may vary, obviously, but a .120 gauge does seem too light, at least to me.