Kinda sounds like a fatigue issue if you start spraying the longer you shoot. Perhaps you should drop the poundage a few pounds and work your way back up. The other option is to shoot fewer arrows at a time. Shoot 3 arrows and then retrieve them. This gives a little rest time. A different cam could definitely take some time to get used to, but, IMHO, this sounds like fatigue. You aren't a newby, so I may be way off base.