Hi I have a beeman rs2 not dual barrel .22 only new for 2014 air gun world have done reviews but been told various things in shops about this but never really got a solid bit of advice now don't get me wrong it's a great rifle give it a shake yea it rattles but for a .22 rifle it's very accurate for example after zeroing with target I had a few old hammer handles 5x and stuck in ground used rws hollow points and hit every one in each one shot it shocked me to be fair but after examining the handles each point I aimed at which was roughly 3cm from top it was a tad low about 7cm from top so adju