Steve xactley the same happened to me with 4lb fire line at Somerset and it was like casting wire; Rubbish! and it was a new spool for that trip on a new outfit! Stripped the bloody lot off and straight in the bin. Never again, it was on special when I bought it but they don't give it away. Barra jack closing down sale at Noosa maybe? Possibly there was a bad batch?
Any way I steer clear of it now. It is hard to go past Harro's bionic if you can get it.