KANAKA BLACK MAMBA 250 gr Broadhead Test
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- เผยแพร่เมื่อ 23 เม.ย. 2023
- This is a test of the 250 gr Kanaka Archery Black Mamba Single Bevel, 4 Blade broadhead.
Here is summary of my 2023 Testing Procedure & Scoring w/the scores of this head posted in parenthesis as well.
Black Mamba 250 gr Total Score: 83.43 = 8 Golden Arrows
1. Flight Forgiveness (20%, 15 pts)
This is not just a test of how heads fly out of my bow, as it was in the past. With a well tuned bow, properly built arrows & good form, almost every head flies well. That's why in the past most heads got a flight score of 9 or 10. But that doesn't help those who may not have perfectly tuned bows/arrows/good form. So now I am gauging Flight Forgiveness. This is based on how the head flies for me, how well it spins, how "sensitive" the flight is to imperfections, & the exposed surface area of the blades. The max score of a Mech is 20 & the max score of a Fixed is 16.
2. Cut Size (20%, 12.23 pts)
The more tissue being cut, the more lethal the head, all else equal. The entrance cut, total cut, & width of the cut (a crucial variable for bloodletting) are all scored:
The entrance cut size is compared to a standard of 2.5" then that fraction is weighted to 7% of the score. (1.063”+.55” = 1.613” = 4.52 pts)
The max cut size is compared to a standard of 2.5" as well, then that fraction is is weighted to 7% of the score. (1.613” = 4.52 pts)
The max cutting diameter is compared to a standard of 2.0", then that fraction is weighted to 6% of the score. (1.063" = 3.19 pts)
3. Blades (20%, 18.55 pts)
Initial sharpness (9%, 175 grams = 10/10 = 9 pts) & Edge Retention (9%, +25 grams = 9.5/10 = 8.55 pts) are measured using the Edge On Up Sharpness Tester. The pressure needed for a blade to cut thru a copolymer wire is measured in grams.
Edge Retention is the loss of sharpness after the head is shot in Penetration Test 1, thru 1/2" MDF and 2/3" rubber foam mat & Clear Ballistics FBI gel. For every 50 "grams" of sharpness lost, 1 point is deducted from 10.
What are some sharpness scores for common edges?
A butter knife takes 2000 grams of pressure to break the co polymer wire.
A new high end cutlery edge: ~ 375 grams of pressure.
A utility razor blade: 200 grams.
Based on the many broadheads I have tested, here is my scoring scale:
Out of the Box Sharpness:
0-200 gr: 10
201-300 gr 9
301-400 gr: 8
401-500 gr: 7
501-600 gr: 6
601-700 gr: 5
Ease to resharpen or replace blades is judged & given 2% of the score. (5/10=1 pts)
4. Penetration (20%, 15.95 pts)
There are 3 penetration tests:
Pen Test 1: 1/2" MDF, 2/3" rubber foam mat, Clear Ballistics FBI gel. Depth of penetration is compared to a standard of 9" & weighted to 9% of the score. (7" = 7 pts)
Pen Test 2: Layered cardboard. # of layers penetrated is compared to a standard of 70 layers & weighted to 9% of the score.
( 54 layers=6.95 pts)
Angled Penetration Test: How effectively does the head penetrate 1/4" MDF covered by carpet at a 45 degree angle. This accounts for 2% of the score. (10/10 = 2 pts)
5. Durability (20%, 18.7 pts)
Each head is shot thru 1/2" MDF 3 times. Its condition is judged 1-10 & weighted to 12% of the score. (10/10 = 12 pts)
If a head survives that, it is then shot thru 22 ga steel plate twice. Its condition is judged 1-10 & weighted to 5% of the score. (8/10 = 4 pts)
If a head survives that, it is then shot into concrete once. Its condition is judged 1-10 & weighted to 3% of the score. (9/10 = 2.7 pts).
Steel plate & concrete are certainly not "realistic" mediums, but they do reveal the outer limits of a head's durability.
BONUS:
+2 very thick blades (.080"-.12")
+1 single bevel rotation: 55 degrees at 10"
TOTAL SCORE: 83.43 pts = 8 Golden Arrows
Price: $58.33/head
Special Notes:
Please check out my sponsor, Stay Sharp Guide. staysharpguide.com or @Innovative Outdoorsman They make excellent broadhead sharpeners. The support I receive from them has helped me improve my channel
I also have some Broadhead Discount Codes I can share:
TRIFECTA: LUSK10 saves 10% on any order.
SEVR: LUSKFIVE saves you $5 on any order & can be used on top of any online sales.
ZEUS & HERA Broadheads (New Era Archery): LUSKFIVE saves $5/pack
Vector Custom Shop: LUSK gives Free Shipping
AFFLICTOR: LUSK10 saves 10%
Tooth of the Arrow: LUSK19 saves 10%
DEAD X BOWHUNTING Big Game Broadheads: LUSKFIVE saves $5 per pack.
Crimson Talon: LUSK15 saves 15%. - กีฬา
Love your work man, your doing some amazing research for all of us, so thanks! You’re like the professor of broad head testing
Thank you!
Looks like you’ve got some big boar test hunting trips ahead with this one. Waiting.👍👍🐗👀
Haha. I need to find a hog hunting lease! Been looking, but nothing yet.
Love the new (quicker) format.
Thank you. I try to keep them as tight as possible. It takes about 7 hours to get a 7-10 minute video :)
Thanks John! Love seeing the 200+gr heads.
Nice. Thank you.
love your videos keep it up :)
Thank you!
Thanks for your time testing things out for us all
You're very welcome. Thank you for the encouragement.
Thank you for all the work you put in these videos John
Thank you!
Very nice head! Great video, as usual.
Thank you
Awesome 👍
:)
Wow what a cool broad head!! Can't wait to see more from them!!
Right? I've got another test of their lighter model coming soon.
Well done as always
Thank you
Gotta love the durability John!
Yeah...except for the edge chatter.
Solid head. A bit heavy for me, but great head. Great testing John. 👊🏻
Lighter model test is coming soon
Nice looking head. The gentleman at Stay Sharp believes that a larger angle on the single bevel heads makes the edge more durable. Additionally, it sounded as though your bow was quieter on the second shot. Maybe it was all that extra tonnage up front :) Thank you for testing various broadheads.
The sound was something with the mic; not sure why. He's right. The steeper the angle, the more durable the edge.
To me this is a 4 blade broadhead. 2 larger and 2 smaller blades but still its construction to me is a 4 blade. I would not worry a bit about edge chatter as it at best would be extremely minor when it contacts bone vs steel or concrete. I think it did very, very well in the testing and it would be an excellent hunting broadhead.
Yeah, it is a 4 blade...just call them bleeders cause they're so much smaller than the main blades.
And we have a winner. I think I've found the head I'll be using on my trad bow arrow setup. Always great to visit the "Lusk Broadhead Lab." Thanks John. Maybe you need to test their arrows too. Very interesting concept.
Thank you.
Thanks for the comments! We've got some setups specific to trad bow hunters. Let's talk!
Love your testing and reviews! Is there any way you can do one on the 2022 Single and Double bevel Bear archery razor heads? Really appreciate it! thanks!!!
Thank you. If someone donates me a pack of each, I'll gladly do it. My broadhead budget is already tapped. But I often get people to donate heads to test.
Sweet looking head. Way too heavy for the hunting I do. I only hunt whitetail deer so dont need anything that big or heavy. Im still shooting fast and light and having great results. If I was to hunt some really big tough animals I would go to a heavy setup. The black mamba looks like it did very good in your test.
They do lighter heads on their website 👍
I have a test of the lighter weight model coming soon. It's already completed and scheduled to post in a few weeks.
That will be a devastating broadhead!
Yep.
These look pretty mean. Their Crochead seems very intriguing to me. Tool steel would be favorable. Have you heard of Edgetac? Check out those monsters and their cutting diameter. Where are you located now? You used to be fairly close to me, and very close to my son. Anyways, keep up the good work, I turn to your videos when I want an honest head review 👍
Thanks brother. We moved to the Dallas area earlier this year. I’ve not heard of Edgetac but will check them out.
Way cool broad head! It would be awesome if it came in a few different weights
It does. I have another one coming up in a few weeks.
I bet it would be a contender if made out of tool steel.
I like the way you think almost as much as I like the way you taste.
It sure would help a lot. There'd be no edge chatter.
I was just thinking it would be awesome to have a broad head with very small diameter bleeder blades which runs length of the broadhead. I which these bleeder blades were slightly smaller in cutting diameter. I'm imagining something just big enough to relieve the friction on the shaft.
They are pretty small as it is...and they do open up that hole for the shaft.
Bleeders on a single bevel seems counterintuitive to me because I feel like it would prevent rotation, but I guess it doesn’t impact it as much as I thought.
The bleeders are also single bevel, in this case
Well, it’s been shown that they really don’t impede rotation, especially if they’re also single bevel, like Iron Will, Kudu, Tuffhead, and others.
If they made this in a left bevel, I'd probably buy a set. If they made a tool steel in a left bevel i'd buy 2 sets yesterday!
Thanks for the comment
Make that head out of 41L40 or S7 and holy sugar honey ice tea that would be one wicked broadhead.
Yes indeed.
That looks like a bone breaker
Yep
What spine is the arrow you shot in the concrete?
It’s 250 but footed with 5 inches of an 2018 aluminum shaft for extra strength
well that was a sad piece of cement block. must be time to get a new one.
Right? It was a weak batch at Home Depot...I tested about 10 heads with it--they got lucky. Home Depot has the normal, tougher ones now.
I think single bevel broadheads are great but I don't lime how they destroy my targets.
Right? What a pain to pull out. I usually use an older, beat up one.
Sweet looking head, i believe we would like to see you demonstrate it on a hog lol.
:) I need a good hog lease! Been searching but haven’t found one.
Make it in S7 or 5160 and it would be unstoppable. Stainless was a bad choice.
Yep
It looks serrated after the steel!!
True. Edge integrity was not its strong suit.
That concrete gets a 0/10
Haha. Right? I went back to Home Depot and now they’re the normal tough kind. The heads that got tested on the crappy concrete got lucky. And there were a lot of those-they will be posting in the weeks ahead.
That thing looked sweet until I saw they are 58 dollars a head lol
They are pricey!
175 bucks for 3 is ridiculous
They are spendy, indeed.
black mambir like that shitty fiocchi ammo
Ok...
440C is the wrong material. Far too brittle, especially at 58 HRC. S7 would be a better choice.
Ironically it's not as bad as many others. It's terrible for regular knives, but it's just okay for broadheadsr. S7 is great for hammers, but for a sharp blade it just doesn't cut it (pun intended).
AEBL should work better. 3V with certain heat treat protocols would be the best, but that's really difficult to work with and I can't see anyone paying that much for a broadhead. Alternative blends and alloys can work pretty well, too, but aren't as good as either AEBL or 3V.
The gradual bevel and the lack of impact resistance of 440C expose the edge to chatter. Machining S7 in this geometry might be pretty difficult and pricey...but it would improve it that's for sure.
Nice geometry, will never understand why anyone would make a broadhead out of stainless steel, PASS!
Most knives and broadheads dull from corrosion. The highest surface area to mass ratio is at the edge. You either keep them oiled (Valkyrie JAG wax is great for this) or use stainless.
For the average Joe, stainless isn't a bad thing. I'd rather have it in AEBL though.
The corrosion resistance is good...and it does get sharp...but a higher carbon tool steel would be my preference for this design.
@@LuskArcheryAdventures Exactly
@@LuskArcheryAdventures S7 at 58HRC has a score of about 120ft/lbs (according to the manufacturer) and at 59HRC it scores 85ft/lbs. 3V at 58 HRC scores 85ft/lbs, and at 60HRC it scores 70ft/lbs. A2, the steel used in Iron Will broadheads, scores 40ft/lbs at 60HRC. And yet I've never seen a regular knife in S7.
We have seen the Iron Will broadheads handle big impacts with little manage, so flat impact resistance or material toughness isn't the most important factor. Geometry plays a huge role, as does the heat treatment itself.
S7 isn't really meant to be used in a narrow cutting blade. If you want it to survive concrete, you might want a softer blade. If you want it to cut through bone instead of roll the edge, a harder blade should suffice. Unless the bone is so heavy and so dense that it stops the arrow completely, like concrete, in which case we're back to a softer blade.
The only real data for AEBL is from a third party that has different ratings for each steel, and he puts A2 way below what the manufacturer claims, but puts AEBL on par with 3V for a given harness. The edge stability of AEBL with standard heat treat options rivals some very proprietary heat treat recipes for 3V but without the associated cost. Edge stability is complicated, but ultimately it's about optimizing the heat treatment.
I don't know why we're using hammer steel for the blades and standard raw material steel for inserts and ferrules. 316 is barely any different from the steel used in silverware and jewelry. If we really can't afford rust on inserts, outserts, and ferrules specifically, use titanium. Why are we paying premium prices for premium designs using regular or sub-standard materials?
So a great head for animals but not so much for concrete and steel season lol
:) I'm sure the edge would chatter on harder bone impacts as well.