Have had three of the four HW50's apart now, and my leather sealed rifle and dads synthetic sealed rifle both had slightly angeled transfer ports.
I might need to check my synthetic sealed gun again, as the ports are less angeled than I expected.
When you stated the were angeled I was expecting the ports to start out in the center of the cylinder, like other angeled ports, but these are less engeled than I was looking for when I opened the first gun.