Yup, Win 231 is a "Ball" powder. It just looks like a flake because it is flattened in the manufacturing process.
It's the old adjust the burning characteristics by altering the physical shape trick. It's a ball just like oatmeal is a grain. Both get smashed before delivery to the user.
Re: Bullseye...I once watched a guy chrono 9mm loads with 90-grain bullets all the way up to 1500 FPS. DO NOT TRY THIS!!! He was obviously way over pressure before he reached 1400 fps. It was an experiment, using a pistol which is no longer made. I think his top experimental loads would blow even a Glock 17.
He did *not* repeat the experiment and sticks with published loading data for all loads now.
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