Bullet Seating

[Montana Cowboy]

Afternoon Dakotah
The dies I use are RCBS with carbide sizer. Not all cases show the bulge but enough of them do to get me to wonder why they do. The brass being thiner on one side does seem like a logical answer . They have worked just fine in my revolvers and pistols. I'm going to try some new brass just to see if they do the same thing. Not sure when I will get around to it as work and the house take up much time as I'm sure you know. MC