I recommend http://www.imsplus.com/ims.html. They carry the good 7-strand stuff. The cord you bought sounds like 650 cord, which works fine, but is not nearly as flexible or easy to work with. I used to purchase from IMS Plus and never had any problems with them. Now that I have to buy thousands of feet of the stuff for my business, I buy in bulk from the manufacturer. Hope this helps.

Semper Fi, George