[SBprone]

Long range shooting makes special demands on a scope. A conventional 1" scope may have just barely enough elevation range for that much drop, and that is why the long range scopes by Leupold and others use the 30mm tube. Also, if your scope on your rifle with your mounts isn't pretty well centered before you start making adjustments then you may have less range of adjustment than the specs on your scope would indicate.

Bottom line, setting up a scoped rifle for long range shooting is a very exacting nitpicky job that often requires the services of a gunsmith specializing in target rifles.

[Eric in the Ozarks]

Agree. The smith is probably as important as the scope.

[ctdonath2]

Agreed, anything beyond ~600yds requires special attention to scope mounting. Using a 1" tube, I need to slope the scope 20MOA down - which is a problem on rifles with fixed scope mounts (Steyr Scout in this case). There are rings which provide such a slope, but so far I haven't found any that are reliable enough.