I was curious as to wether or not a simple 66mm-80mm ED refractor would hold up as a spotting scope when sighting in large rifles.
My brother shoots a Barrett 50 cal, and he needs a new spotting scope. The concern is the shock wave generated from such a large rifle, and any potential miscollimation as a result. He is a competition shooter so weather would not be an issue.
Edited by Jeff Porter, 18 August 2014 - 05:56 PM.