rfwobbly
Member
I have had an issue that looks like your photo when using clean cases with dry Hornady dies.
The issue turned out not to be the dies so much as the lack of case lube. The carbide ring (which is a different material from other die brands) apparently is (or was in my case) gripping the brass and physically moving it toward the case head in a very slight, but noticeable way. The "ring" is the result of the die not being able to "size" the entire case due to the shell plate holding the case rim.
In my situation the cure was to start using Dillon case lube. This is a lanolin and alcohol mixture that can be used immediately after application. Lanolin is a well known extreme pressure lubricant.
I would not fire that case in a chamber that wasn't fully supported.
The issue turned out not to be the dies so much as the lack of case lube. The carbide ring (which is a different material from other die brands) apparently is (or was in my case) gripping the brass and physically moving it toward the case head in a very slight, but noticeable way. The "ring" is the result of the die not being able to "size" the entire case due to the shell plate holding the case rim.
In my situation the cure was to start using Dillon case lube. This is a lanolin and alcohol mixture that can be used immediately after application. Lanolin is a well known extreme pressure lubricant.
I would not fire that case in a chamber that wasn't fully supported.