Originally Posted by Jay_In_Parker
Another thing you may consider is 'Super-lines'. While im not a fan of them I do know you can get a alot more line on the spool with a higher test. Like 10lb may have the same size as 4lb.
I use superlines (Power-Pro or Spiderwire) exclusively and use a 3-6 foot leader of mono on the end. As Jay mentioned, you can get more of a heavier #test on a reel because the line is much thinner (8lb diameter has a #test of 30-40). The superlines don't stretch and are much more sensitive. The Mono Leader on the end (8-12lb depending on what you're fishing for) acts as a bit of a shock absorber when setting the hook (so you don't rip it out of the fishes mouth) and also helps with fish who are leader/ line shy.
* * Back in the day when I was growing up in MN, I lived for pike fishing and caught all of my pike (1-15lb...not monsters, but decent sized) on 8 or 10lb test mono with a cable/ wire leader on the end. you could really go either way.
The only things to keep in mind about putting larger line on a reel that's not rated for it is that
1) Obviously, less line will fit on the reel and...
2) a smaller reel is designed to reel in smaller fish so the strength and gear ratio of the reel match the size of the fish and vice-versa with big fish and big reels. Drags are also matched to the reel...so if you catch a big fish on a smaller reel with heavy line, you may not be able to set the drag tight enough to control/ reel the fish and end up tiring the fish excessively before you can land it.* Catching a 25lb pike on an ultra light reel would be interesting to say the least. I think going up a size or 2 in line shouldn't matter though.