I've noticed that one of my rifles the crosshairs jump a little when dry firing. Also I did the coin on the end of the barrel test and this gun is the only one that the coin falls off. I don't think this can be good for consistent precision and accuracy. The rifle is a Rem 700 .308 stress free bedded into a Choate stock. I have other Rem 700s that don't jump near as much as this one. Any ideas on how to reduce it?