RE: Changing Arrows
True - but a 400 series Eastonarrow (100 gr. tip) in the 27.5 to 29 inch range is about right for a 60# bow. And for a shorter arrow, the 500 series are recommended.
Just shoot the FMJ's. They are one of the best hunting arrows out there anyway. The Gold Tips are a quality arrow as well, and certainly there is something in your setup that is preventing these arrows from grouping. Spine may be part of it. But some setups just like certain arrows. Run with it. . . . .