Okay, for those who don't know, I am a tackle distributor (sell to bait and tackle shops), so this is something I've done some discussing about.
I'm not trying to indicate that any of these three lines are identical or even similar, except in one characteristic. The lines I'm referring to are IronSilk, McCoy's Mean Green, and Realine. They are all formulated from a copolymer base. How the chemicals work and react and all that jazz that's way over my head, coupled with the heat and extrusion process, define how the line will handle in different situations. All three suggest that they have high abrasion-resistance and low stretch as well as low memory.
The KNOT is the focal point of most failures on these lines. The abrasion-resistance is BELOW-WATER. The lines seem to have a low melting point, so a knot needs to be wetted WELL before being cinched down. If not, the lines tend to "burn" themselves, causing a weak spot in the line right at the knot from the friction of being rubbed against itself.
Changing knots or taking more time and more moisture on the line should change your experience.
My personal opinion on IronSilk is that it's much thicker than other mono-type lines in the same pound ratings. The color is also a bit odd.
McCoy's is supposed to be an excellent line, but isn't an inexpensive line. Realine is supposed to be very good as well, but not nearly as hard on the wallet. I tested some realine last night with my digital normark scale and the 4 pound line broke at just over 4 pounds with a simple loop knot (so the hook of the scale would have something to hold to).
Also, one other thing to keep in mind is the true size of the line. A lot of line will say it's 10 pound line, but have a 14 pound diameter (and a 14 pound strength). So, two brands of 10 pound test line will not break at the same point.
