Went to swap out the recoil spring in my NHC and pulled out an old Wilson spring caddy kit I had tucked away for government slide length. Pulled the 17#, but noticed the 18 1/2# spring was shorter. I know this is a shot in the dark and shouldn't make that great of a difference in weights(don't plan on shooting any plus p). But is there a chance the springs made it into the wrong slots from the factory? Or am I looking at this wrong here. I'm guessing spring weight has less to do with total length as does compression length? The order in which they were labeled is that the 17# was the longest of the three. If it has more to do with compression length than total length, what gives with the differences in total length?