I have tried epoxy and JB weld with good clean shafts and inserts and still had a problem from time to time. What I have been doing now with great success is first I take a piece of emery cloth and roll it up so it fits tight in the end of the shaft. I rough up the first 3 inches of the inside of the shaft, then clean that and the insert with mek or acetone. I cut a piece of 1/4 wood dowel 1 1/4 inches long( take a shaft to the hardware to find a dowel that fits in the shaft snug but easy) Now dampen the dowel and insert with water then apply some Gorilla glue on them, start the dowel in then work the brass insert in, stand the whole thing up till it's dry about 24 hours. The end product will be an arrow with an internal footing that will hold up better than any you have had in the past. The are as tough as nails and your inserts will stay in.