It may be a gimmick, but it might open up a wound like a garden hose too. I'll reserve thoughts until I could test one.
However, it does seem like they'd "knuckle ball" in flight.
I have several compound buddies that use those Rage heads. I thought those were a gimmick at first too. But, if shooting a compound, they create blood trails like you'll rarely see. If you know anyone shooting a compound, those Rage 2 blades is what they should be shooting.
I only mention this because I thought they wouldn't work well in live hunting situations. I was wrong.
It looks like they're only offered in 100gr. Obviously marketed for compound guys. But with a weight insert, I sure wouldn't be afraid to test one for fun. Really all they are is a fixed 2 blade with an extra set of bleeders. Fred Bear used bleeders, so bleeders aren't non-trad. IMHO.
I found this text, but can find no video of the test...
http://mikeshepherd.net/ftp/Bart/Section10_F15.pdf Introducing the F-15 broadhead by Carbon Express -- the first and only broadhead with dual, side-by-side cutting blades. The two razor-sharp blades give you 6 cutting edges and create a 250% greater wound opening than single blade broadheads. This means significantly greater blood loss, a better blood trail and ultimately, a faster kill.
For this demonstration, we’re using a basketball that has been filled with water. Our first shot through the basketball is with an arrow equipped with the Rage broadhead. Notice how the water simply trickles out of the exit hole, because the Rage broadhead blades only cut slices through the “skin” of the basketball.
For the next shot, we’ll use the SAME basketball, turned to the side, to compare our F-15 broadhead wound cutting channel with that of the previous Rage shot. (* GFX: note the Rage exit with arrow, text).
While the Rage wound cutting channel is still only trickling out, notice how the F-15, with its dual side-by-side cutting blades, creates a complete cutting channel through the basketball – which is why there is a large stream of water pouring out.
Take a look at this close-up of the F-15’s exit hole. Notice the clear flaps created by the dual side-by-side cutting blades.
In this split screen, you can clearly see the difference in water coming out between the Rage broadhead on the top of your screen, and the F-15
broadhead on the bottom. As you can see, there would be a much greater blood loss with the F-15 dual blade design.