I don't like Powerbond or the original Gorilla glue, or any other glue that expands when it dries. Had too many created globs behind the insert from the expansion and cause a wobble that is difficult to correct. I don't like using any heat whatsoever on carbon arrows because it is bad for the resins that bond the carbon fibers. So, I use instants.
Gorilla Glue Super Glue. Not their regular, original glue; their super glue. Has rubber particles suspended in it for impact resistance which makes it perfect for inserts. Been using it for a couple of years on my arrows and arrows I build for others, and it has never failed me. Works good to secure bowfishing points too.