I'm going to take the shafts to work and take a close look at them and tear them apart. I know I didn't build the arrows properly according to Easton. I should have used a BAR to protect the end of the shaft. So I tore them apart and took some measurements. 1st, measurement of the set depth of the HIT insert(I couldn't get this one accurately) . 2nd, the total length of the insert.(I came up with 1 inch long from the insert I busted out of the shaft) Trying to figure out if the adhesive failed. The ones I broke open seemed like they were still solid in the shaft. I couldn't get the whole insert out of the piece of shaft. I also couldn't determine if the insert broke off, that's what I'm trying to do with the length of the insert measurement. The two arrows I shot at my doe to finish her off both lost the broadheads somewhere in her. The shafts still had insert remaining but couldn't determine the damage. I took this deer to a processor so I'll never know what if any insert remained on the threads of the broadhead. If the broadhead pushed back into the shaft It seems to reason the insert would have had to be knocked loose, but they seemed to be glued pretty solidly in place as I tried to get them out of the shaft.