I don't know
but I got some Gold Tip 5575 arrows and some NAP 100grain broad head and let me tell you, it is awesome.
Previously (for my entire life) I've shot alum. Eastons and Muzzy's.
I don't know, maybe it's mental, but my group at 20, 30, and 40 yds is dead on the money. I don't know what inch group, but they are all touching and dead center on the 3D target.