Buckeye,
I understand. The reason for the change-up is this... my pro shop owner weight my arrows and said they were at 400 grains. When I used the arrow builder on the Gold Tip website, the XT 5575's at 28.5" with a 100 grain point and 4" GT vanes should weigh 388 grains. It could be that the arrows really weighed 400 grains or his scale was out of calibration. Since it's the same shop that sold me $100.00 worth of underspined arrows, I'll assume that the website calculator is closer.I don't know. I'm starting to confuse myself with all of this.
That being said, I'll be happy with 267 fps with an arrow this heavy.