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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You'll need the have the large thread insert in your press, or a removable 7/8" bushing.
Give Martyn a call at X-Ring Services, Spokane WA for EVERYTHING you'll need, and take a look at Rob's outstanding how-to videos on Youtube at britishmuzzleloaders - none better, IMO.
Rusty wood trading in mission bc is were i picked mine up. But he has the shotgun brass you have to convert yourself, which is an expensive learned skill. You will waste a few peices, but you can tell within the first 1/4" if you have made a mistake and it can still be used in a snider rifle.
you will also need proper bullets once your casings are fire formed lee dies over size the casing down and it will need a .458" or.459" bullet when the martini henrys really use a .468" to .470". neck sizing can be done with 480 Ruger dies