I've experienced the same as 98XJRC.
Over the last 12 months or so I've opted for a fairly stiff shaft, in a light GPI, with a decent amount of weight up front. It flies well and has penetrated everything I've shot it at superbly.
250 spine cut to 26.5 inches, with 45gn of components on the front and a 150gn broadhead. Total arrow weight is about 475gn, and I'm shooting 77# @ 28in.