Yes - Mike's advice is spot-on.

The paper jacket by the late Paul Mathews is an excellent start - and finish, or you can continue with Loading Black Powder Rifle Cartridges, by Paul Mathews.

I went from having trouble & struggling with paper patching BP rifle Ctgs., to ACING Paper Patching after reading & following Paul's methods in "The Paper Jacket".

Today, 20 or so (more) years later, I am still using the wax paper 'barrier' disks, but might switch to the more 'modern' bee brood foundation he spoke of in later books, likely "Loading Black Powder Rifle Cartridges" which I also have.