The best I can offer is that in P-Line when you go to the CXX Xtra Strong you are looking for a super-tough line, not a memory-free line. Its TOUGH but you will need to change it out sometimes or you will have those mentioned problems. Now, if you just need strength, not necessarily the abrasion resistance check out the CX Premium. That line is stronger than the X-tra Strong but is a much thinner diameter. (I dropshot 10 lb and its the same as Maxima 6 lb and is even the same color). In addition to its low diameter strength the Premium is also the lowest memory line I've ever used! I was a huge Maxima fan until I started using CX Premium... now I won't go back.

Matt