A question for folks who have taken game with the new single bevel Zwickey No Mercy broadheads...What do you think?  Did it perform as expected?  Did you see the advantages that a single bevel is reported to have?  Would you recommend them?  Thanks for your input.

Good question...what are the supposed advantages to single bevel broadheads?    :confused:

read Dr Ashby's reports

im shure they work fine i dont know if they have been out long enough for much big game killing yet,  i hanvt used them and never will unless they make them in heavier weights.

i have only killed one pig with them so far, worked great !!!! but with the shot i put on that pig i would expect anything to put it down quick.
i am waiting for a shoulder shot to see how they perform, but i won't purposefully take that shot so it might be awhile.

Tell ya what I found and you can take it for what it is worth.

I had two wood arrows, same spine, within 15 grains, both RW helical fletch.  I put one no mercy RW on one and a LW on the other.  Heads were sharpened and weighted with 1 grain of one another.  Shot them at 10 yard repeatedly into a new rhinehart broadhead target.  Every time the penetration was equal between the two arrows.  Apon reading Ashby's reports I would have expected the RW helical arrow with the RW head to out penetrate the other arrow with the LW head.  But that was never the case.  I know its not animal flesh dead or alive, but it was an equal density object that one should have out penetrated the other.  I was impressed on how the arrow rotated into the broadhead target but that was about it.

Like I said, take it for what it is worth. dino

Dino, I think their are 2 reasons you saw no difference in the penetration.  On is as you alluded to that the foam will have different characteristics from flesh and bone.  Much of the stopping power of foam targets is by maximizing friction along the arrow shaft as it tries to slide by.

The second reason I believe you didn't see any difference is because broadheads that are triple laminated at the tips then single laminate thickness along the rest of the blade will recieve very minimal if any benefit from single beveling.  The benefits of a single bevelled edge will be much greater with a thicker blade.

For example, if broadheads such as the Silver Flames (0.071" thick) and the Steel Force Phat Heads (0.080" thick!!!), were to offer their heads with single bevelled grinds, you see a tremendous benefit.

I thought the only real benefit to single bevel was the BONE_ Busting from the rotation that allowed for great penetration when Bone is accidently encounterred...

Not sure but thats what I got out of the reports...

From what I've read of the reports flatbowMB and Slasher are correct.  You need a thick blade to get the most benefits from the single bevel.  When the blade twists in bone it splits it making it easier for the rest of the head/shaft to pass through.  When passing through flesh, the head will rotate creating a spiral cut (possibly inflicting more damage).  However, I'm not sure single bevels penetrated more in soft flesh.

Saying that, both my Grizzly El Grande heads and my Magnus I that I filed to be single bevel both rotated in layered foam.  I don't know if the Grizzly rotated more or less than the Magnus I.

Jason

With the added inertia of the rotation of the feather the RW head with the RW feather rotation should out penetrate the RW fletched arrow with the LW beveled head?????  Both heads rotated into the broadhead target for their given bevel.  It must be that matching the feather to the bevel of the head must not be that critical is all I can figure. dino

One thing to consider is that the layered foam's friction may be much greater than anything else.  Foam is not flesh or bone, so it's hard to make real-life comparisons.

Jason

TTT