Whelp, I got the Battlecord in today. The neon orange color is nice and bright. In some brands the "neon" orange is more just plain orange. I did notice on the paper wrapping it stated the working load of 265 lbs, and not just the tensile load. So kudos to Atwood for including both numbers, and putting a big whopping safety factor on there (10).
As has been said, it's really really stiff. It made me think of when you're weed-whacking or something and have two long extension cords, and you tie a loose square knot between the cords so the plugs don't pull apart. That's about the stiffness level.
Tying knots is kind of a pain because you really have to cinch everything down and pull it tight so it doesn't just open itself back up. I think this stuff would probably work best for securing larger objects, like on the back of a flatbed truck or trailer. Wouldn't work too well for trying to lash a water bottle to your backpack or other small jobs like that.
I'd say this would be something good to keep in the car or truck maybe, or for other specific applications, but for general use cord I'd still stick with the 550 or 750 paracord for my bag or coat pocket.
If I'm able to do some actual testing on this stuff, I'll start a new thread.
P.S. If you need more strength the paracord but still need something fairly flexible, you might look at nylon "accessory cord" that climbers use, in the 7mm style. (I've tried 8mm but it's bulkier and stiffer, so 7 seems the happy medium)
I've bought a couple of hanks of this BlueWater stuff:
https://www.bluewaterropes.com/product/7mm-accessory-cord/