I am trying power pro 30lb test on a penn 704 for the first time. When I spooled up the line wasn't tight on the spool and a 300 yd spool of line filled the spool up. Question, should I put backing on the spool and wind the power pro line on tight ( i thought I wound it on tight the first time ) or leaving it on a little loose is ok? This is my first time using this product and I am not sure what to expect. I use this outfit strictly for casting plugs. Thanks in advance.