I recently switched to powerpro. When I bought my first spool I did not notice I had 2lb diameter 10lbtest line untill it was on my reel. The first fish I hooked was a mid-teens fish and after several minutes the fish made a sudden "at my feet" break for it and snapped my improved clinch knot. After that I switched to the palomar knot and its been all good from there. A good ten fish later and not one snapped palomar knot.