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.
It's a good question...I know (as many here do) that open/cylinder is what's recommended for things like bird-bangers and flares, and that it's the "polychokes" that you need to be most careful with [regarding flares] but, in short, for the backpacker specifically....
My Griz 12.5" has a modified screw in choke and fires everything without issues until guns very hot.
When the guns been firing hundreds at a time I've had a few bear bangers ignite in the barrel and just make a huge freakin boooom and fireball out of the muzzle with not much recoil at all.