Sounds like you figured out the factory load issues with the heavy spring ... that spring is for REAL 10mm loads ... like DoubleTap's.
I haven't loaded any AA#9 in 10mm, but from what I've read and compiled that load might be on the light side ... I'm assuming that you don't have a Chrony ... that is really helpful when you are working up a load. 11.3gr is a start load, so I'd take it up bit by bit to the max they list for AA#9 ... I haven't used any #9 since I reloaded for the CZ-52 a few years back, so I can't recall if it was particularly dirty or not ... I doubt that the crimp is a problem. I'd recommend 800X for the 10mm ... it gets it up where it was meant to fly
I'd also order some DoubleTap loads .... they are normal pressures, but they'll put a smile on your face ...
Saands