Some skepticism should be expected. The first videos I saw of this cartridge was from a fairly popular Guntuber. I used to think some Guntubers were decent, but I’ve noticed most of the popular ones don’t care what they say as long as they get paid or kickbacks. Like when that same guy was stating that some ridiculously short freebore (.106?) was required for 105 hybrids in a 6creed. My numerous .136 and .181fb 6creed’s say otherwise, and the .181fb can run factory Hornady 108’s. Dude lost all credibility after that when it was clear he was just shilling for a builder. It’s probably good marketing for the masses, but these wildcats likely aren’t targeted for a casual plinker.

Aside from it using a 223/5.56 bolt, I just don’t see the big benefit. Due to the case length, for use in an AR, it’s like the 260 vs 6.5creed debates of old. Yes, both can work in a gasser, but due to a shorter case length, the shorter cases have more flexibility in potential bullet options (6.5creed and 6arc). If you’re going with light weight bullets for varmints, then the 204ruger and 22ARC would be better options.

Just my opinion

Just to check on my two favorite mediocre rounds I checked on 277wolverine and 25-45 loaded rounds. Sharps had not had any loaded rounds for almost a year ...they just happened to have one offering this evening . 277wolverine has been pretty steady . I think the 277wolverine has gone past 5000 bbls ...not sure about the 25-45 . I see 6mm max in roughly the same boat . It's not a bad thing ...it's a pretty decent cartridge...it's just mediocre.

* I picked up a 277wolverine bbl a couple of years after Kurt made me a 6.8x40 ( actually closer to 6.8x42) . Kurt's x40 would launch a 85gr bullet at over 3000 fps from a 16" bbl . The dies are basically shortened 7mm tcu dies . This is why I know a 6mm tcu would be within 3% of the 6mm max ( if that much ). Efficiency.  You don't need a proprietary cartridge.

* 300 blk mags ;
https://www.midwayusa.com/product/1018507080

** 6max has the same case taper as TCU .

*** .390 is 3.2% greater than .378 .  59.9 is 9% greater than 55 .

**** if you do the math , the 6 tcu is out pacing the 6max ...to a certain bullet weight , sure . I'd say 80-87gr the tcu is out front .

***** the 6max has 7% more room for a bullet ...93-96gr

****** if they wanted to make it spc vs grendel they'd make it the 250max . 6.35x44  vs  6x38.5 . Just some late night thoughts .

******* this kinda makes me happy with the 6max; if you bump it to .257 and go 93gr x 1.07 = 99.x gr . That's a nice place for a AR15 250 savage .

******* but then I can run 25-45 in the SFAR at 2.5x" and get all the BC and SD .  110gr . No proprietary brass or rebated rim ...

I did a quick look at the 85gr btsp 6max from 20"

-2930 fps
-.380 bc
-.204 sd
- .95ish bullet length

VS  25-45 sharps 87gr speer sp from 20"

-2885 fps
-.300 bc
-.188 sd
-.88ish bullet length
* takes std brass & mags

** I looked at the 90gr eld-X but at 10% less than 243 win it doesn't look too hot in the yardage dept

*** Starline would do a run of 7x49 GJW for 50k pcs