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.
Note: This feature may not be available in some browsers.
I'm with Jerry on this one. Anything other than a Lapua Improved should be fine. If you decide to push your standard Lapua to extreme speeds / pressures you probably won't find your best accuracy anyways.
