Screwbolts

Perhaps i should try doing the work on my Accura breech plug, before making a reply, but i can't stop my fingers. My concern with using a counter sink would be that it wouldn't allow a deep enough concavity in the muzzle end of the breech plug. After all, my main goal in reworking the bp was to make the face of the Accura breech plug look more like the face of the Omega breech plug. To me it seems the counter sink would make a concavity too close to the edge of the breech plug before it went deep enough to make this work worthwhile. Am i thinking clearly here?