This string was recommended by a lawn care service that was doing youtube videos. I put it though its paces this evening going from thick grass and weeds to pithy stuff like polk weed, to woody stuff like small 1/4" sprouts at the base of trees, to getting it into some cattle panel by accident. It shrugged it off with no visible damage. I was running it in an older Husqvarna 232R with a single line string head. I don't know how it would do in a bump feeder.