Running a WF19 riser with Long SF Ultimate Pro ILF Limbs, for a 64" 45 lb bow. Selway slide on.
Initial grouping before tuning phase I was running Black Eagle X-impacts 500 spine with 250 gn up front.
But then tried the Gold Tip Pierce and like their outsert system better than the Black Eagles. So tuned those in and I find they group better than the Black Eagles. So final tune is Gold Tip Pierce 500 spine, 30.25" long, 250 gn up front. 520 gn total arrow weight. Broadhead will be a 250 gn RMS Cutthroat.