F.I.T.A, N.A.A., Collegiate Archery, And J.O.A.D.
Recently I looked at TopHat Archery's website and found that they produce and sell a 120 grain point for VAP arrows, meaning a g nock size internal diameter.
I was intrigued and asked about heavier than this in that diameter as I am currently using 140 grain points in my arrows in stainless...