Sequel M390 Timeline

I hear ya.
I carry mine on my belt so I don't have the dulling change issue.
Just be careful, there isn't a lot of back spacer there to sand down.
You might just leave it as is and after a few good sharpening sessions the problem will just go away, if you know what I mean.
 
Yeah, I do. Kind of how you work it out on a slipjoint, short of peening the kick out :)
 
I've always liked the 707 Sequel. For a small knife it sure packs a big blade. I never owned the M390 version but it looks nice.
 
Just an update. Still my EDC and still loving it. Anodizing is holding up well. Edge doesn't hold up like CPM-M4 I have used, but its stainless so I let it go...

Went out mountain biking all Saturday and ran 5 miles in the woods Monday. During the run I took it out of my pocket at the river and it fell dead into the mud/sand buried. Rinsed it out in the river without opening and rinsed it with fresh water from my camelback. Brought it home and soaked it in mineral oil. Got it cleaned out now and working out the excess oil and reworking the nano oil in.

We will see how the springs hold up now. I hope well.
 
richstag said:
Just an update. Still my EDC and still loving it. Anodizing is holding up well. Edge doesn't hold up like CPM-M4 I have used, but its stainless so I let it go...

Went out mountain biking all Saturday and ran 5 miles in the woods Monday. During the run I took it out of my pocket at the river and it fell dead into the mud/sand buried. Rinsed it out in the river without opening and rinsed it with fresh water from my camelback. Brought it home and soaked it in mineral oil. Got it cleaned out now and working out the excess oil and reworking the nano oil in.

We will see how the springs hold up now. I hope well.
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I would expect the springs to hold up fine. I believe they're pretty stainless. I have a couple of axis locks that have been through he**, including mud and sweat, and the springs have held up fine. And I'm not talking about dedicated water-knives (the H2O versions).

I'm glad to read your opinion of the edge-holding of M4 vs. M390. I was just trying to decide on whether to try to get the knifeworks 810 in M390, or the regular in M4. Since I have a Ritter in M390 on the way, I'll take my time and get the 810 in M4.
 
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richstag said:
Just an update. Still my EDC and still loving it. Anodizing is holding up well. Edge doesn't hold up like CPM-M4 I have used, but its stainless so I let it go...
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Wow, that's odd. M390 seems to hold a bit longer than CPM=M4, I thought.

Went out mountain biking all Saturday and ran 5 miles in the woods Monday. During the run I took it out of my pocket at the river and it fell dead into the mud/sand buried. Rinsed it out in the river without opening and rinsed it with fresh water from my camelback. Brought it home and soaked it in mineral oil. Got it cleaned out now and working out the excess oil and reworking the nano oil in.

We will see how the springs hold up now. I hope well.
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I would have disassemble and clean the parts, but that may be over kill. :D
 
M390 should outperform M4
All geometry and variables being alike of course.
But I love this knife.
I have had a plain blade satin 707 for nearly a decade and it has performed great.
Also has cut backspacers from blade impact but hasn't caused a problem.
I wish they made more if these. I want one with a black blade.
 
Dude m390 is not outperforming the m4 I used. And I had my m4 much thinner. The stuff I do toughness is key. M4 holds up significantly better for me. Do note I cut thick hard metal of the commercial seam sealer can and it didn't damage the edge much. Still shaves with heavy force.. But I put my m4 through hell and back and I've run this one through some of the same. No contest m4 hands down.
 
I actually gave my m4 mini grip to a friend on this forum. He is in the trades. Stone cutter and he reported back almost a year of not having to sharpen it...
 
Oh and I forgot to mention I love this knife too. It's just I have found in real use m4 is tougher and stronger by far and I don't notice any lack at all for cutting abrasive materials.
 
Didn't have a chance to get back to my diamond stones and real strop. Seams a translucent stone and cardboard do an admirable job on this steel. Got most of the damage out from the can aside from deeper chipping.
image by Richstag, on Flickr
 
:rolleyes:
Keyman said:
I hear ya.
I carry mine on my belt so I don't have the dulling change issue.
Just be careful, there isn't a lot of back spacer there to sand down.
You might just leave it as is and after a few good sharpening sessions the problem will just go away, if you know what I mean.
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FYI - I tried carrying my 907D2 on my belt recently and got close to damaging myself. Somehow the blade got caught on something and was half-way open. Hopefully KM's is in a pouch. If Otherwise that's not a good method to save oneself from pocket change and keys. :rolleyes:
 

image by Richstag, on Flickr

Just a quick cell pic.

My opinion of m390 is getting better. I am actually able to keep this knife cleaned up with my Arkansas stone. Still has some chips I need to get out with diamonds. This is something I could not do with the m4. I used it a lot this week and it held up admirably. It is not nearly as good on tough stuff as m4 but the stainless aspect is growing on me. I also love how easy it sharpens to a seriously bitey fine edge. I am thinking of trying a plain edge in this steel of my own. Would love a sequel but they aren't available.

Anyhow. This knife is a diamond in the rough if you ask me. The steel isn't the best but due to its ease of sharpening I really like it. Since I carry both carbon and high hardness high carbide steels I usually needed both Arkansas and diamond. Not now.
 
Today first shot at rope with the serrations. Very large diameter rope.

image by Richstag, on Flickr

Had to unload about 150,000 lf or quarter round. Cut heavy plastic banding with no edge deformation or degradation.

Cut through that rope in almost one cut. Had one last strand to grab. Pretty impressive.
 
richstag said:
Absolutely not in my experience and my applications.
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Interesting, your data differ to mine. BKC keeps CPM-M4 about 62-64HRc,where M390 to be 60~62HRc for whatever the reason. That may add to less wear resistance of M390.

I can see CPM-M4 having Tungsten Carbide that may have upper hand, but considering M390 has more carbon and Chromium with Vanadium to suppress grain growth may make two fairly even. Some of the forum user also experiences their M390 to have upper hand. Interesting to see same blade made by both steel achiving optimum hardness may tell actual wear resistance.

CPM-M4:
Carbon 1.40
Chromium 4.00
Manganese 0.30
Molybdenum 5.25
Silicon 0.55
Sulphur 0.06
Tungsten 5.50
Vanadium 4.00

M390:
Carbon 1.90
Chromium 20.00
Manganese 0.30
Molybdenum 1.00
Silicon 0.70
Tungsten 0.60
Vanadium 4.00
 
richstag said:
Today first shot at rope with the serrations. Very large diameter rope.

image by Richstag, on Flickr

Had to unload about 150,000 lf or quarter round. Cut heavy plastic banding with no edge deformation or degradation.

Cut through that rope in almost one cut. Had one last strand to grab. Pretty impressive.
Click to expand...

Thanks for the test report. It sounds very good.
 
Yeah, I know the breakdowns and I have even seen Ank's tests and consider him a friend. I am giving you my real world usage. The M4 is much tougher in my two example. Like I said don't notice any real difference in abrasion resistance.

MobileFireLord said:
Interesting, your data differ to mine. BKC keeps CPM-M4 about 62-64HRc,where M390 to be 60~62HRc for whatever the reason. That may add to less wear resistance of M390.

I can see CPM-M4 having Tungsten Carbide that may have upper hand, but considering M390 has more carbon and Chromium with Vanadium to suppress grain growth may make two fairly even. Some of the forum user also experiences their M390 to have upper hand. Interesting to see same blade made by both steel achiving optimum hardness may tell actual wear resistance.

CPM-M4:
Carbon 1.40
Chromium 4.00
Manganese 0.30
Molybdenum 5.25
Silicon 0.55
Sulphur 0.06
Tungsten 5.50
Vanadium 4.00

M390:
Carbon 1.90
Chromium 20.00
Manganese 0.30
Molybdenum 1.00
Silicon 0.70
Tungsten 0.60
Vanadium 4.00
Click to expand...

It is very good.

MobileFireLord said:
Thanks for the test report. It sounds very good.
Click to expand...
 
Slight update. This IS my favorite EDC at this point. Also, M390 has earned a spot in my arsenal. Awesome steel.
 
Yeah, coming back to toughness point. I have been trying with both blades, and sure does CPM-M4 with more tungsten show off it's tensile strength.

Still, I like M390, but having a second look into S30V for toughness for everyday scenario as well.

Thanks for lengthy report, Kevin!
 
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