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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Chemical compositions and such are proprietary information and no company's going to give those away to be posted anywhere. Consider the secret Coke recipe...
If you are talking about how they perform or what amounts to use for reloading, there are quite a few sites. Hodgdon is a good place to start. http://www.hodgdonreloading.com/data