I have NEVER had to rezero any scope unless I changed loads. I have a 20.00 Tascoe 4x scope that has been shot a lot. Its been on the same 30-06 for over 30 years. I have yet to take the adjustment covers off of that scope. Thats been the ussual for me with most tascos and all Bushnell. This includes the Banner and Trophy models. I have a 10X Bushnell Silhouette scope that has about 5000 rounds of heavy loaded 308 rounds through it in competition. Never touched the adjustments once it was Zeroed. I am not knocking Leupold as I have a few of them too. I have an M8 and two 3x9x40's. I won't spend more than the VX l costs though and only got those for the eye relief. Thats before I found out that the Aetec has quite a bit more eye relief than my Leupolds. I have always got what I paid for. Just never had to pay that much.