I have some 30-06 brass that I received to reload for a friend and after trying sizing using 2 different sizing dies it is leaving a slight 'ridge' or 'bulge' near the web. There are 3 different head stamps in the mix, win rp and fc, and they all show the same problem, some more pronounced than others. The rifle they were fired out of is a 1909 Mauser from argentine I believe. I'm not brushed up on my mauser history but i'm just assuming that this thing probably has a pretty loose chamber to begin with because when before sizing, you could see that the brass is bellied out a some at the web, the worst case measured .472 at the 'bulge' area. Once sized, the cases are showing .464-.465 at this area. Its difficult to see in the picture but you can tell where the sizing die stopped, and you can feel a slight 'hump' in the case with your finger.
My question is, is this normal? Is it safe to reload them like this? Am I doing something wrong? I am new to rifle reloading, I've loaded .223rem and .300blk and have never seen this issue, though all of my brass for those calibers has come from current production rifles.
Any input is greatly appreciated. Thanks in advance