I had the exact same problem with the small turret which Val then swapped for the big turret which had the exact same problem on both a bolt .308 and a semi .308
Sad because the 9-36 glass was great but re-focusing after every shot.. not cool.
Val swapped it for a 3-18 that seems to be holding up but I miss the magnification.
Damn.....I was just looking at them and seriously considering oredering one next week. I have heard the glass is great but I think I wil wait a while till they work out the mechanical issues...
It seems to be pretty well established fact that the 56mm objective IOR's have had major reliability problems. I own 5 IOR's (24mm, 32mm & 50mm objectives) so this isn't a slam, just an observation.