Are you using the decapping pin? Is there a lot of resistance on the up stroke?
Try resizing without it. I use the same dies and while good it took a bit of mucking around to get them to work a small bump as well. If using the decapping spigot, especially after anealling you will likely be pulling the neck back up changing the readings you're getting off the shoulder.
I have even had to grind some length off one of my dies for a custom cartridge.
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