Never heard of this unless you are hitting something hard, is the target in front of a wall and the arrows are going through the target and hitting it. Secondly I use loctite super glue for my arrows instead of hotmelt. Maybe your glue isn't good enough to hold during impact, I hear that goat tuff insert glue is the best.
That is what I shoot in my 2512's out of my Destroyer. I haven't used them in carbon but I've been very happy with them on my aluminums.......enough so that I just ordered some Full Bore nockbusters to fit my new Ht-4.
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