Awshucks, what size shaft and type of shaft are you using. I have heard of problems with the graphite arrows, but have not heard of many problems with the allum arrows. What you can do if your using 2216 serries is use the size for the 2117 arrow (tighter fit). Another option might be a light rubber band wrapped arround the shaft (you could adjust the tightness for the added friction you want),

My dad with the Expmag has not had problems with his Scropios, other then have them stop on the fletching while in the game. But as he says, the cost of fletching is minute to harvest a birs.

Hope this helps.