On the contrary, I have found as have others, that the posilok does indeed work. It is my opinion that this was out of necessity as Burris used to use a brass zoom tube which, being much heavier than 6061 aluminum (used by Leupold) exerted much great forces on the springs than the lighter tube. A properly sighted in Burris with posilok securely tightened will not move at all. It is a PITA to sight in but once done is secure.
Now that Burris has switched to 7000 series aluminum for SOME of their zoom tubes I doubt it is needed.
I have had exactly ONE Burris scope go bad. I sent it back and it was promptly returned in perfect working order. I haven't had to send anything back to Leupold yet so I can't comment on them. I have heard that they are a lot more discriminate than they were even a couple of years ago as to what the consider abuse and what is warranteed.
Dennis
