The strings themselves tend to last a long time as long as there are no signs of them weakening via broken strands or anything. The serving is usually the first to wear out. I've gone thru a serving in two or three days of heavy shooting, which is not a problem now that I serve my own.I shoot mine until I see the serving starting to fray bad, recently read where worn servings are detrimental to accuracy, so will be changing them out sooner now.