While you are on the site, in your browser find and click "Add to Home Screen" A CGN beaver app icon will then be created to your phone that is directly link to the site.
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Bushnell Elite 3200 2-6x32 has stood up to a couple hundred 30-06 rnds, not sure it is up to any quality standard though
Leup VX III 1.75-6x32 handles 338 mag so far so good
Burris has one too