Do your fired cases chamber with no resistance? You can see this problem when sizing die and chamber aren't a good match. Couple of things to look at is how much you die is sizing the body/shoulder junction, usually .003 to .004 is plenty. Also can check how much the cases are growing in case length. Shouldn't be seeing much length growth with a 30 degree shoulder case. It darn sure could be your press is flexing a bit. Looking at your pics it looks like the neck bushing is leaving some ridges on your case necks. Bushing may need a good cleaning and polish.