After a decade of dog tracking, and going on more deer trailing expeditions than most guys will go on in a lifetime, with all kinds of broadheads, traditional and modern, I've only been able to correlate one thing....In my experience, on average, the bigger the broadhead, the more blood on the ground. We rarely got called on "good" hits, but only on ones where they couldn't find the deer themselves.
Never saw a single vs double bevel correlation to blood amount, just broadhead size. ALL broadhead performance info is simply anecdotal, there is no way to do scientific correlation, too many variables at play (no matter what some folks claim...I dont want to get off topic but I can argue science...its what I've done as a career for over 20 years
). This is just my personal anecdotal observation after 100's of tracks, the majority of which were "poorly hit" deer. You hit em perfect...likely doesn't matter.
R