You need to meature of a case not the die.
Id buy a box of loaded ammo and use it as a guide. If you cant get brass than the whole project will be a bust. right now primers an most brass are imposable impossable to find any were. perhaps there might be a memeber who has a round you can have or borrow.
a .005 cmaller case mouth is a lot to be off by. Id sure the heck get it right. the case length is critical as the round head spaces off it.
Didnt cabelas have ammo and brass for this?????/