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.
Overshot cards 500. $12.00. Hard to find
Roll crimper $ 40.00. Budget shooter supply ( after Sept 19th ) or eBay
Cereal box and 3/4 hollow punch $20 eBay ( punch your own cards )
I am not sure what you are using for hulls, wads, or slug, but "nail polish" would need to keep the slug from falling into the chamber. Wax fails in a warm barrel, even hot glue fails in the cold. It is: roll crimp or star crimp. Most other options include a higher risk of loosing fingers due to a bore obstruction.
This is what I do... http://www.canadiangunnutz.com/forum/showthread.php/900975-12ga-reloading-with-WillisJake