hornady custom grade dies and formed brass?

I got the dies that you can’t adjust the shoulder it just goes back to factory settings so your brass isn’t ever really formed.

Should I go ahead and get a new full length die and a shoulder bump gauge so I can just bump back shoulders a little bit instead of completely?

Guns a 6.5cm just now getting into shooting long range some and would be happy with .75-1moa is this possible with my set up now?