My Baby Eagle, in 40S&W, has a weak spring, as it throws brass a country mile; however, it will sometimes fail to bring the next round into battery. Instead of increasing powder charge, I'm going to try heavier spring. My current theory is to much of the light spring energy is being used to strip the next round out of the magazine. Field testing in near future.
A lack of planning on your part does not necessarily constitute an emergency on my part.