Try another scope
I did once have one day where I couldn't hit jack! (I really wasn't happy but he was pleased) seriously, my targets were 4 or 5 inch card targets and I couldn't hit them :oops: where as the day before I could easily deliver a 5.52mm butt plug in a woodies ass!
Eventually gave up, went home, cleaned barrel, checked scope, checked EVERY FECKING THING, Began a strip down then realised that it was a single nut on the stock that was loose! Tightened it up again and back to pellet on pellet!
Fickle things our lil babies
Tony