No idea as to the problem or cure, have you shot the actual head or just the practice one? Do they all do it? How’d they spin test? Grim Reaper has great customer service, I would call and explain the situation and see what they think…They will probably send you a new package and see how they work. They can be reached at 801-377-6199; Toll-free: 877-GRIM-REAPER (877-474-6732).
I switched to them last winter and have put down 5 gobblers and a bear this year…..no flight problems or any problems for that matter….been flawless killers.
1 question and don’t take this the wrong way..why would you switch broadheads 2 weeks before season? Were you experiencing the same problem with another brand?
Anyway, they have made a home in my quiver…..bring on the deer
I hope you get it figured out