Sometimes I think we "know too much" about rope. We read about cycles to failure and working load limits and never crossing rigging gear over into life support or vice versa.......and that is good. I want to be safe. OTOH I have been working with rope my entire life and I have never managed to break a rope with out applying a huge shock load or thousands of pounds of tension. That includes some cheesy low quality ropes and good ropes that have been loaded over and over again, run over natural crotches and tied to backleaners and pulled with the truck. I have ropes that have been in service for many years, (Actually I gave a couple to my stepson to use skidding little trees last year that I had for 20 years!) I downgrade ropes after a lot of use......but is a rigging application really a downgrade? (I don't want to smash anything or anyone -do you?) And yes I downgrade rigging lines to tag lines and hand pulling over trees..... and then because it is an old rope I decide to use it to drag a log or pull someone out of the mud.....and it holds.