Had my ar20 for a few months now, first strange thing is that no matter which pellets I use every 6/7th pellet went wild, put it down to my shooting.

Changed my scope and for the last three weekends off a bench, I've tried 3 times to set it up.

Problem I've got is that it just won't hold zero. Set up at 30yds pellet on pellet. out to 55, 45 & 40. Decided to go back to 30 to find its dropping about an inch, back out to 55 and its its dropping there to. Reset at 30 and same thing happens.

Tried usual things cleaned barrel, changed pellets (JSPs/AA/Mozzies/Accupels) , cleaned pellets.

Think it time to send it back to BAR - can't think of anything else it could be.