Ok,
Finally got my magazines back from G.T., and so far no improvement. With the original magazine in place, and the #38 mainspring in place, every other shot ends up as a failure to feed. The Mec-Gar had similar results.
With the #40 mainspring, the gun fails to eject I believe because it is not traveling far enough to reach the ejector. Did not matter which magazine was used.
The #36 mainspring gave no improvement as well with either Mec-Gar nor original magazine.
Perhaps I should clip one of the new mainsprings down to 19 coils? Which one should I start with?
Jim Solomon's tool got a good exercise in mainspring changes. With a little practice, I've gotten darn good at the mainspring swap.
