My understanding is that PowerPro is just a name brand for Gel Spun. It was recommended to me that I go with the 50lb to prevent any cutting of the fingers and over wrap on the spool. I have never gone for the big game stuff so not sure what the ramifications would be with just 30lb. Abels website uses a conversion ratio of 60% when comparing to 20lb dacron and 100% if comparing to 30lb for the 50lb Spectra. Hope this was helpfull.