Wobbly, just looked at another source for powder burn rates and saw a Winchester 571 and a 572. Oh well.
Edited to add - just looked at several powder burn rate charts on the internet. Some only list 571, some ony list 572, some don't list either.
Unkown to the people making the charts? Not common enough to test? Mistakes when the number was typed in? Who knows.
The ones that do show 572 show it with Blue Dot, right before or side by side.