Spyderco Hap 40, Rex45 and M4 head to head edge retention testing. Let's see how these 3 slug it out 

Big Brown Bear what angle would you suggest?

You're welcome

Thank you

Thank you

Thank you

You're welcome

Almost, it's my Pug that follows me everywhere and falls asleep. I don't remember all the videos I've show clips of him but it's about 6 or so. It's sad loosing any if them, our Boxer passed away a couple months ago.

@@Outpost_76 - they all sound so similar. Sorry to hear about your boxer man. Yes its so hard. Its been almost 10 years since losing my 2 bullys Bruiser and Dixie, about 2 yrs apart. I still think about them every day. We'll see them again....

also alows for less burnt edges from the factory? been wondering about that but seems it may likely help

Thank you, I need to do something with my original Bradley

Same! I’ve have a Rex 45 Millie that is itching to be used.

You're welcome Kurt

Have you tested these knives yet, Kurt?

@@SteveKluver I don't remember! 😁

Thank you

Your level of sharpening skills have a lot to do with it. I find them to all be easy to sharpen. Nothing to be worried about when it comes to a new edge.

John Scarborough what model did you buy?

@@johnruff7417 As soon as I close out my raffle on the XOC I'm going to buy the Advocate

Heyyy it's my good friend John!!! Hiya doll!!! From 3 years in the future lol, hows that 15v lol

@@EDCandLace Ha! Well hello. Not surprised to see you stumbling in here 😁

I need to revisit 4V so its something that will happen along with Cruwear

Yes, yes, Outpost 76. Please. And make that *"CPM"* Cru-Wear, BTW: People simply do need to stop saying "Cru-Wear" as most do, if what is *meant* is "CPM Cru-Ware" (à la Spyderco) -- the two are very different, as the photo-micrographs and 'toughness' measure data at Larrin Thomas's website plainly show! I have the Manix 2 and Native 5 in CPM Cru-Wear now, and I'm very happy that I do. Along with LC200N, it's currently the "grail" blade steel for me now in the Spyderco universe (provisionally). Thanks!

You can look at newer tests and compare the Rex 45 Manix to the M4 Manix here. All are listed in the Google doc spreadsheet of testing results.

I don't use any with freehand. If the factory edge is still there and it looks even I use that. Once I've used the KME I know what the angle is and I just sharpen to that angle. I do have an angle gauge somewhere but I haven't used it. I should get it out and check some I've only done freehand on to see how accurate I've been.

Same grits, fine edge means how long it cuts until it will no longer shave and working edge is how long it will cut until it snags/no longer cleanly slices paper.

Lol, I keep a large stack close by.

I've missed so many comments over all my videos. As far as hardness I've run enough of each and through others that can get hardness testing done that the M4 here is about 63 and the Rex Para 3 is mid 65 to 66. Yes I'd say that's why the M4 cuts just as much at a lower hardness co.pared to the Rex. I do have some things in the works to be able to do more hardness testing to go along with steels I run. I'm not sure exactly when but it will be happening.

Its the same edge. Fine is gone when it no longer shaves hair.. then the cut test on carboard continues untill it no longer slices paper. That is a working edge. Hope this helps

I do 300, 600 and 1500 diamond for all tests so far except these 3. I strop 6, 3 and 1 micron for testing again except for these 3 that just got 10 passes per side in 1 micron. For my own knives in personal use I usually don't go past 600-1000 grit depending on the steel. Alao for my personal use I vary how I strop depending on steel and use. You can email me at gdniel@yahoo.com and let me know what steels you are sharpening as well as use and I'll give you some reference to sharpening and stropping.

Sharp Talk

You would have to mill the out layer off. No volunteers yet! 😁

No way to without doing as Kurt said.

Might be kind of hard to measure all that. Don't ya think? I mean the purpose of the video is measurement of results. I think it's a great idea for a new channel though. You could run tests on chicken bones & zip ties and then whittle some logs into chopsticks! Let me know when it's posted, I'll watch it!

jcoolG19 2 The point is, at least the Aussie cuts rope. I see Steve and now you cutting cardboard and that’s not what the vast majority of people who own these blades use them for. We do use a cheap box cutter. I wish Steve - a COOK or you will incorporate material that we use these knives for. Leather, wood, rope, rubber and plastic and even for hunting so bone. Cardboard is a terrible indicator of edge retention. As long as you did the work, how about cutting across shoe soles on a cutting board???

@@marincapital2586 I don't do cutting tests. I would bet that people cut cardboard way more than rope with their knives. I usually try to save rope. I cut plastics, nylon banding and a fair amount of cardboard at work. Rarely do I use my pocket knives on food or bones. I have kitchen knives for that. For me, and most people I know, cardboard is a relatable medium. It's also inexpensive, easily obtained and, most importantly for cut testing, measurable.

I use cardboard because I cut lots of it outside of testing at work. I buy my knives to use for whatever I need to cut no matter what it costs. I find no fun in using a utility blade to cut boxes. I do also cut lots of zipties and pallet straps. I don't use my folders on food, I use fixed blades mostly for any wood prep I need to do and it's a rare occasion I cut rope or garden hose. I understand some don't want to use a 200$ knife to cut cardboard but that's not me. My Shirogorov and ADV get the same use and cost much more than any of these in the test. There are all different aspects when it comes to knife use. As far as cardboard as Kurt said it's a measurable material just to show differences in steels and hardness. Most knife users I know cut lots of cardboard the same as I do and it's more relatable to edc use while giving an idea of what a given steel at a certain hardness is capable of.