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 do not know if it is significant for centre fire, but the "pellet" targets that I bought from Cibles are alleged to be made with "short fibers" - so holes are round and not tears like I get with normal printer paper.
I would also suggest making your own or finding a copy online and taking it to a print shop. Ask for a heavy weight bond or card stock are my personal two favourites.
Or even order some up from the listen people/organizations and then taking one to a local print shop to be copied.