I shoot bows in the 57-63# range with fairly heavy, weight forward arrows that hit very hard. I also shoot at the Muzzy stump shoot competion which is about the ultimate test for arrow durability.
Over the years I've tried about everything, and most have failed...
Hot melt doesn't cut it, most epoxies, and even the high impact Gorilla super glue...it's all failed on me.
JB Weld, as has been mentioned here already is what I've found to be the absolute best.
I also add a 1" alumin. footing over the end, also with JB Weld to make a tough arrow almost indestructable.
JB Weld is great stuff!