Hmmm.... interestingly enough, Taurus customer service told me they use a 16# recoil spring in the PT1911. So, Cimarron, could you tell me where you got your information? If you got it from Taurus I am going to be really confused!
Gray_Wolf, yes the heavier spring could cause some issues with lighter loads. As far as factory loads with a 230gr round, I haven't heard of an 18.5# recoil spring being a problem for feeding and ejecting rounds. However, if the PT1911 uses the standard 16# recoil spring, then I am going to stick with that weight when the time comes to swap out the recoil spring.