While I don't have one of the new Coonans, my understanding is that they come with springs for both .357 and .38special level loads.
The original guns also used a different magazine for .38s, but Coonan has redesigned their mag for the new guns, and while it takes a spring change to shoot .38s, the mag is the same these days.
The key to running any auto pistol is balancing the load level and recoil spring tension. Neither the Coonan nor any 10mm is any different in this regard.
__________________
All else being equal (and it almost never is) bigger bullets tend to work better.
|