First One, 35 Round Echelon Magazine?

No there really isn't a 35 round Echelon magazine. But I did a little experimenting with a factory Springfield Armory 35 round XDM magazine and was able to get it to work! We had one no strike while using the full steel Yankee Hill R9 Suppressor. Looking at the video afterwards I think my hunch was right. Combined with the subsonic Remington ammo the slide was slowed down enough by the heavy suppressors weight on the end of the barrel. Switching to a lighter weight Aluminum can and the pistol seemed to like that better with the slide not dragging as much. This is my second Echelon and the first shots out of this pistol. What a test to see if I could make an experimental magazine work.