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The Cliff's note version of this thread: The dropbox permalink below contains the latest data on line testing and will be updated with each new line test. https://www.dropbox.com/s/z0rt7cbdccq2on7/Latest Braid Test.xlsx?dl=0 The data contained in the Excel file is the cooperation of the members of this forum and other fishing forums. Lines were sent to me and suggestions were made to make the results more useful. The data contained are the line's labeled strength, the line's tested actual breaking strength, the line's mass(10ft of line is weighted then divided by 10 to get mass/ft), the line's strength to weight ratio(S/W), the line's derived diameter in inches and mm, as well as the knot strength of the line(mainly FG and PR knot strength). Stop here and proceed no further if all you want are test results. Testing the ABS(actual breaking strength) without taking a mass measurement would be useless since it does not give us a sense of the quality of the line. 10 lbs line that breaks at 30 lbs is not necessary the best 10 lbs line if the diameter is the same as most other brand's 20 lb test that breaks at 35 lbs. With the help of Paulus just fishing and the members of this forum and the line tester creator who came up with the idea of measuring the mass instead of trying to pinpoint the diameter of a line that is generally flat when compress with a caliper, we were able to derive the line's diameter given its mass. The basic idea is that Density = Mass/Volume. The density of Spectra and Dyneema is well known and published by Honeywell and it is 0.97 g/cm3. The density of water is 1 g/cm3 . This explains why all the lines I've tested float. So I sent lots of line to Paulus Just Fishing and he tested the ABS and measured the line's diameter. Using the same exact lines, I measured their masses and was able to correlate a density range of .70 to 1.0 g/cm3. This was done at the time without realizing that the density of Spectra and Dyneema is 0.97 g/cm3. It was nice to know that Paulus measurement is accurate enough and our precision scale is precise enough to get a result that agrees with published data on Spectra and Dyneema. Since we know that all braid are not spun the same way and that at the very best, no matter how tight it is weaved, the final density can not exceed 0.97 g/cm3. In fact, it is safe to assume an average of 0.85 g/cm3 to account for various different weaves among 4 strands and 8 strands line. Using that number yields a diameter that is within 6% of the MINIMUM diameter possible given the mass of the line and a maximum density of 0.97 g/cm3. Now that we have that out of the way, diameter is easily derived by extracting the line's diameter from it's volume. The volume is the volume of a cylinder that is 10ft high and whose radius is 1/2 the line's diameter. This is what happen when we shape the line into a round object. It is a cylinder with tiny diameter. Excel makes it easy once all units are properly adjusted. You can look at our derived diameters and you will find that it comes within 10 percent of Paulus measurement. Yes we did go to great length to validate our method since posting a line's actual strength without it's accompanying mass is pretty useless since it does not give us a sense of "quality" of that line. Mass translates to diameter and while we are accustomed to diameter affecting casting distance in spinning reel, we should easily convince ourselves that all things being equal, a 1/4 oz jig loaded by the bend of a fishing rod can only have so much energy to carry a mass of line so far. The heavier the line, the less distance we will achieve. The line tester used below has two very large 4 inch PVC arbors. Testing have shown that by bypassing such large arbors and only using the 1/2 inch metal round rods reduces the ABS measurement. This has to do with the sharp bend of a small metal rod. For the ABS test, there is no knot and lines are simply wound around metal rods and PVC arbors. Only a rubber band is required to hold the line in place since the force on that part of the line is reduced greatly with 12 or more turn around each metal rod. A picture is worth a thousand word and if you dig thru the threads in here, you will see videos of tests done here. For the knot test, the knot is placed between the large PVC arbors.