A .550 spine, 11 gpi, running 185 grains up front, 489 total grains. My 52 pound stick loves them.
Victory Archery Carbon Trad shafts, .204 diameter, dark wood grain finish, stainless steel components, with spines like .550, .450, ideal for guys wanting a heavy shaft without having to run 300 grains up front to soften the spine.