BIG MAC - I dont think this is your problem mind John you have had some good bags in the past with that rifle
so cant see it being that mate and its all ways been spot on for you .
I ALL WAS CHECK ZERO ANY WAY BEFORE SETTING OFF LOOKING FOR PRAY---
Cheers mac, i think your right mate im sure its the scope its never happend before untill the past 2 weeks and its changing from left to right, if it was canting would it not be to the same side, i dont know. And same as you mac i always check zero with the first few shots mate