RB,

I can' t say I' ve ever had or seen this problem, unless it was the " too much glue" issue. I' ve never had any problems getting alot of different heads on an ACC 3-49. Wasps, Rockets, Muzzy, T-Heads, Gametracker, Barrie, Phantom, Steelforce..I' m sure I' ve forgotten several.

However I' ve seen plenty of field points that are poorly made and won' t always thread correctly.

I would try some different brand type field points and see what happens. Although it' s possible that there is something wrong w/ the inserts, you say the Jak-hammer fits fine, and this leads me to believe there is an inconsistency in the threads of those tips/heads that won' t seat fully.

You may just also want to invest in a dozen new inserts (minor cost) and see what happens. If the same thing happnes with the new inserts, you can assume the anomaly is in the heads/tips.