As one who was around at the time when springers were being used at Internationals , I can tell you that it was near enough 100% FWB 300's of various editions, my wife shot an Original 75 Nationally and Internationally for a while, and was always the only non FWB at Internationals, she preferred its neutral action to the FWB, but changed to a Walther LGR as soon as they were available.