Daryl, Truth is, I shot a Cosmi 20 ga. in Argentina! I wasn't with the fellow shooting it the first day, but we all shot together the second day and in the morning the gun wouldn't function at all. One of the fellows, writer Nick Sisley, mopped three paper napkins of gun oil out of the action (having been "cleaned" by the bird boys the night before).
After that, six of us took turns shooting the Cosmi all day without a hicup, balk or failure to function. Simply a marvel, the gun must have had a 1000 rounds through it that day, some shot it very well. It seemed like farm machinery to me, the mechanical cycling of the action with each round fired sounded like a baler making small squares.
But as for autoloaders, the Cosmi is a masterpiece... and soooo beautiful, too!