There have been a lot of reports about the performance of Jerry Brown hollow core line on spinning reels. Although there are many people who use hollow core on spinning reels, for some, the jury is still out. The concerns I'd read about centered around: line twist (wind knots), casting distance, and line capacity. There are performance benefits of hollow core: no knots and therefore greater strength, and smoother casting through the guides; and easier repair by line to line splicing. So I decided to load up a couple spools and take the risks of the problems others had mentioned. JB hollow core line with an actual breaking strength above 102 pounds (this would be equivalent to PE8) was loaded onto the Stella 20000 spools by BHP Tackle under 10 pounds of tension. Two spools were loaded, each spool took 450 yards. The spools are deliberately very full, see photo. Since the spools were loaded by a rotating machine, I used the Hybrid method described in Spooling for Minimum Twist to reset the top 100 yards. Yesterday was a windy day (what better day to test for "Wind" Knots) and I spent an hour casting these spools with 2 oz., 3 oz. and 4oz. weights. The rods were fairly stiff 7 footers (St. Croix SWS70MHF). I have previously tested casting distance for this rod with 30# Cabela Ripcord (don't ask why I ever used that, it came free on another reel) and usually got 80 to 85 yards with 4 oz. "Wind" Knots The spooling technique used resulted in smooth casting with no twists, threats of twists, or curly-Qs about to become "wind" knots. I am now confident that correct spooling of any line keeps the twists out and hence the dreaded "wind" knots. There are many things that can introduce twists to any line but in tuna fishing, hundreds of yards pulled off spinning reels against the drag with the bail closed, and then wound back on are a big culprit. Therefore I plan to reset the line after each trip where I've fought (or hopefully caught) fish. Casting distance (measure by grid on the field) 2 oz.: 65 into the wind, 75 with 3 oz.: 70 - 80 4 oz.: 75 - 85 Research The Handbook of Fibre Rope Technology (borrowed) says that hollow core Spectra weave, when loaded, requires no more volume than solid braided. It also states that although 16 carrier and above (number of fibers woven) can flatten, 12 carrier and below does not. I have chosen one of the JB 12 carrier hollow braids.