hmmm that sounds about right..... I've just seen this happen before when I switched from shooting aluminum arrows to carbons.... I was shooting easton fall stalker 2219 aluminum arrows and switched to carbon express... can't remember size right off the bat but they flexed a little on release so I let off the weight a little and its perfect now... I shoot from a regular stalk rest instead of one of those drop aways (in other words the plastic ones with the sticky strips).