Ever since the discussion on linen I've been on a mission to find superior quality linen for bowstrings. Badger pointed me in the right direction for some that he's personally tested. It's a little more pricey. I just found some 6 strand, ultra thin, "military grade" linen that is being advertised as the "highest quality we've ever found" at natural-craft-supply.
They're advertising it at 38# breaking strength. It's priced nicely at $27 for one pound/600 yards. Anyone have any experience with this before I take the plunge? At $26 I might have to be the Guinea pig.
They also have an imported 7 strand product that they're advertising as "exceptionally thin" and breaking at 48#. It's higher at $37/lb but there's 820 yards in the roll.