I shot it through a chrono. A 28.5" arrow w/ a 27n draw. Arrow weighs 423 to 435 grains
Sounds like that is a camo shaft

Could you give me some details on your arrow. Like fletching, wrap, etc. And you are sure you have the Destroyer 350 and not the 340? Numbers even look a little slow if shooting the 340 with camo Axis 340's at 65#/27". Spine looks great though.

I find PSE's to miss the mark on FPS projections by quite a bit, but Bowtech is usually awful darned close. Sure would like to find out what the deal is. Though archery chrono's are known to vary about 10 fps from one to the next. 45 fps seems a little extreme.
Do you have a good pro shop with people you trust close by?