If it seems like sometimes your gun just isn't shooting right, there's a couple things you can check.
First, did you start dialing in with your 100 yd zero? Sometimes, this is all it takes to get back to shooting like you and your gun know you can. Always start and end you session with setting your scope back to the 100 yd zero.
Second, do a quick equipment inspection and make sure nothing is loose. On the video above, the screws were loose on the scope mount and the scope moved. This of course affected our accuracy.
These two quick things can save you a lot of frustration.