Die Adjustment -- Shoulder Bump

[jmart]

How low can you can go and still get reliability? Under .003? .003 - .004? Or do you need to bump greater for reliability?

[Alpha Sierra]

.003 to .004 inches of shoulder set back is plenty to assure proper chambering in semi auto rifles. Bolt action rifles can get by with about half that much if needed for accuracy due to their far stronger camming action on bolt closing. More is not always better.

Mind your case neck length also.