Lawman, this exact issue came up a number of years ago with a chap from England having the same problem. At the time I had a Greek 1903 action which I was given and it too had the same problem although this one was so bad that it would not allow the cartridge to move forward at all. It has nothing to do with the pressure exerted by the spool but rather the shape of the projectile positioning protrusion that you have circled.
I then spent some time with a Dremel and removed just enough material to allow the cartridge to feed smoothly. From memory it also had to be radiused. After that it functioned flawlessly. The English chap then did the same and his worked as well without any problems.
If you send me a PM with your email address I can take some pics of my action for you so you can see the modification that is necessary.

Matt.