Zwickey "No Mercy" Single Bevel Broadhead

[Baffinland Archer]

Lads, Lasses,

Anyone know where I can find the Dr. Ashbey report on this broadhead?  Got a notice from a well-known bowhunting supply firm about it in my e-mail yesterday. Among other things, the advert says that broadhead flies better and works in concert with left or right wing fletching so you have to specify what you are using in order to get the correct broadhead.

I am not one of those folks who immediately jumps on the bandwagon of new and improved products. For me, the allure of the single-bevel broadhead is not the aerodynamics but the fact that I would only have to sharpen two edges rather than four. Anything that purports to simplify my life and lessen my labours generally gets my attention.

If anyone has any comments on this new broadhead, please do pass them along. I have complete faith in the firm that sent the advertisment to me, but I'd still like to get others' opinions and I would like to see that Dr. Ashbey report.

cheers

Robert

[Bonebuster]

I have some ordered through 3-Rivers. I have a boy turning ten in a few days. This fall he will be entering the woods as a hunter instead of just an observer. Any penetration advantage we can get, we are gonna try.

I`m sure that with the satisfaction I have always had with Zwickey broadheads, these will be no different.

[dino]

Someone can correct me if I'm wrong but I don't believe Ashby has tested these heads.  Primarily because they are so new.  Dale Karch and Denny Sturgis Jr. both used prototype No Mercy heads to harvest Water Buffalo in Australia two years ago.  I seen some of the rib bones that they brought back that were penetrated by the heads.  It was very impressive.  Those were double bevel heads that they used.  Danny Dupuy of 3R used the first single bevel No Mercy last fall to harvest a Kansas buck.  What impressed me is how shaving sharp that head still was after blowing thru that deer and being stuck in the ground.

Maybe if Denny sees this he could report of how they performed on those buffalo.  I don't remember the detail enough, just those split ribs is all. dino

[Dr. Ed Ashby]

Robert, I haven't tested the No Mercy yet; haven't even laid eyes on one. However, I have some on order from 3 Rivers. They will go into this years testing.

With single-bevel heads, metal hardness is a big factor, because the edge is thin (at low bevel-angles; which is what you want to use). The rotating edge takes a hard pounding as the BH rotates through a heavy bone. If the metal is too soft, the edge will roll.

Blade thickness is a big factor too. A thicker blade means more bevel surface-area (at any given bevel angle). The amount of bevel surface-area in contact with a bone, at any given instant during breaching, is a factor that affects the amount of rotational torque created.

Otherwise, the best I can offer in the "Why Single-Bevel Broadheads" article. You'll find it here on TG, in the report's forum. I think it's in the section with the 2007 Updates. Otherwise, there's a load of single-bevel vs. double-bevel testing outcome data scattered through the many Updates, but the 2007, Part 4 (just posted today) has a good summary overview of cumulative single-bevel results to date.

That will get you started,

Ed

[SlowBowinMO]

We have the new Zwickeys as well.  I like 'em!  They take less time to sharpen than a Grizzly and they fly laser straight.

I've not killed anything with one yet, they are too new, but they will be with me this coming season for sure.  It is sure nice to be able to pick from left, right or double beveled.  I have received countless e-mails the last couple years asking about left beveled Grizzlies, that hasn't happened but now we have something available.

Looking forward to your serious testing of these heads Dr. Ed, thank you for all your contributions.

[Dr. Ed Ashby]

Tim, several little birdies tell me that there are more single-bevel BH's to come over the next several months. Think I might run out of buffalo or money before I do new BH's to test! What a good way to go.

Ed

[SlowBowinMO]

I know, so many broadheads and so little time!   :D

I haven't seen as much new broadhead activity all at once on the "traditional" side of things for a long time.  This is an exciting year for sure.  

[Baffinland Archer]

Thanks all for the responses and thanks to Dr. Ashby for the valuable leads.

I went back and read over the advertisement and realize that I misread it: the advert indicates that Dr. Ashby have reviewed single bevel broadheads and not specifically the Zwickey "No Mercy" broadhead.

In any event I shall tuck in to Dr. Ashby's report and educate myself.

thanks all

Robert

[bm22]

i have shot a tree branch and a pig with them, i did slot them and put old brittle bear razorhead bleeder blades on the zwickey. i spilt the tree branch verticle 6 inches in either direction of the hit and the bleeders sheared off perfectly and the broadhead kept penetrating.

i am worried that the bevel surface isn't much compared to the 125 grain grizzly's that i have.

on the pig it was the best blood trail that i have had on a pig. on a side note i shot it from a tree and it was about a perfect shot so i expected a good blood trail. she made it about 50 yards.