I wish I still had my old one to compare but I could have sworn that I read somewhere (Saubier maybe) that the design changed. With the extractors they way they are, I don't know that I would be able to generate near the force to close the bolt by forcing them over the rim. That would seem darn near impossible. I'll have to pull it out of the safe and see if I can recognize a difference between the two. Or its the way the magazine sits that allows the bolt to grab the round when sitting on top.
I can tell you with confidence though that there was definitely a difference between the two. The older one I had would have required a dead blow to get that bolt to close when single fed. The new one does it without issue and you can't tell the difference between single feeding it or via the magazine.
