Originally Posted by Nealsey
Well, change them round first and see, try closing and moving the mounts as far apart as the rails
will allow, this may gain you something if the mounts aren't parallel.
Other than that I recommend the adjustable ones, although they take ages to get right.
I'm surprised you commented on how long it took to set the mounts. After centring the turrets on my big Nikko I used the adjustment on a set of ATP-66 mounts and it was close to zeroed within a couple of minutes without touching the turrets. A few clicks on the turrets finished the process. Yes they take longer than fixed mounts but it is still only a couple of minutes.