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Bonus material to the thread - I finally picked these two little a$sholes up 2 weeks ago. 14 weeks old, male, blackass tiger cats - yes, black cats with black stripes. I'll need to get them in the sun to be able to show that - but they're tinyass little terrorists so far. They fight all the time, ripping each other up, tangled up in a big ball of FIGHT, tumbling down the stairs... TactiCat doesn't take it - he's teaching some MANNERS IN THIS HOUSE. He mostly ignores them, but if they fight, and somehow end up close to him, he just throws a paw out there and rolls both of them across the room... I ain't kidding, you cannot PAY enough for entertainment like this... Since they're twins from the same litter (abandoned, bottle-raised from 2 weeks old), I wanted to name them Windsor and Cleveland. As it turns out, one of them it a little bigger and a little meaner than the other one, so they're officially known as Windsor and Hemi...

So, this is getting shot tomorrow morning. We'll see how it goes, and I'll get results in here afterwards. I couldn't wait, so I raided the best scope to try this out, that was appropriate - the Athlon Talos BTR 4-14 mil-dot scope from the 16" Grendel. It went in an Armalite 30mm scope mount that I had in the box, and I cut the V-TAC Mk1 FDE sling for this gun - I'm now down to only one spare, new, uncut Mk1 sling in the parts box. When I originally ordered the Noveske QD Flush Cups, I got 2 of them (needed ONE of them for the Mk12 Mod 1).... Shipping then didn't make sense to order just one, so just gimme 2 then... - but it was one HELL of a chore to find that thing. I apparently "put it someplace safe" that was SO safe - I played hell finding it, too... Finding it sucked, it was like a sick game of "Where's Waldo?" all over the compound... It was in the center console of the Nissan Super Truck... WTF?!!?... Raided the MagPul picatinny-mount bipod from the Mk12 Mod 1, too, just for tomorrow. This this is a shiit-pile of "stolen parts" right now... But I'm gonna shoot it. This is NOT my preferred front sling mount for this gun - but it came from the 16" .300BLK that I tore apart last year. That front sling setup was cool on a PRI Carbon Rail, but it's not permanent for this rail. I need something different, but this works for tomorrow. Plus, I only had one spare QD sling swivel, and that was going on the ass of the gun...

Accurate 2520 is my permanent powder for Grendel, no way am I switching. 28.5gr AA 2520, Hornady brass, CCI 41 primers, 123 Hornady ELD-M projectiles, loaded to 2.245" COL. Lee Factory Crimp Die applied to them afterwards. That load is giving me (chrono'd): 18" = 2534fps 16" = 2475fps 12.5" = 2369fps Start lower for the 4064, as you know, and come up. I went 0.2gr spread on this load development.

Wait 'til you get to that threaded pin for the bolt catch - you're gonna love that even more...

If you need to live near the headquarters, Pat - you have a place to stay until you can relocate permanently. If you need a place to stay, while you're out here just talking to them - again, Casa De Pain is at your disposal. You should be my neighbor anyway...

Even after I figured everything out, and it cycles like a champ,and the 147s RULE in that gun... Hornady then releases the 153 grain A-TIP projectile... See what I mean? They have the exact same published load data for their 147s and 153 A-TIP - but it'll still be a little different in actual chrono and performance... The way things are going with projectile development, there is really no end in sight, for what we might see in the future... What bothers me most is that you have a LaRue barrel, and their own 130gr Match ammo isn't running your gun. There's something to that, and I just don't know what it is. They MUST be doing something with a light recoil system, for their own ammo to run in their guns... I'd like to take apart that ammo, and see what it's made of/from, chrono some... Just see what's going on there. I think I need to order a couple boxes of that in my next order, and try it out.

I've got my .260 Rem load up to 1500 yards supersonic, and it drops trans-sonic after that - which is pretty damn good. No reason a 6.5 Creedmoor couldn't do that, too, or very close at supersonic max. 1200 yards for either of them should be child's play, with plenty of gas after that. Neither one of them can topple a .300 Win Mag in that realm, though. My .260 Rem drop-for-distance is very, very close to my Win Mag drop-for-distance. They're almost the same. In one gun, I'm delivering a 147gr projectile. In the other, I'm delivering a 225gr projectile... With similar drop-for-distance, the winner for me is the one that's delivering that "same drop" with almost 80 more grains of projectile weight - and ft/lbs of energy... I won't shoot that Win Mag all day long, though, even in a great stock, great recoil pad on it, and a bitchin' muzzle brake. Not all day, no way. I can shoot that .260 Rem for days on end, with no letting up... Different reasons for both, but both will always have a place in the safe...

You can go about this with either direction... Initially, mine cycled my 147gr ELD-M load just fine, with a 0.070" gas port. It cycled my Barnes 120gr TSX load just fine. It wouldn't cycle my 140gr ELD-M load, and I was near max-charge once I worked up with it - still no cycle. I was on the borderline for gas port diameter. I punched it to 0.080" - no more issues. The only difference between yours and mine - we share identical dwell time (gas port position to end of barrel), but I'm running 20" rifle gas, and you're running 22" rifle+2" gas. 0.080" works on mine, but maybe you'd need to be at 0.083"-ish, or something, just because it's a 22" barrel?... We're gonna be close, identical would be preferred, but it's not a guarantee... If all I was ever gonna shoot was my 147 ELD-Ms and the Barnes 120 TSXs - I would have left it alone. I didn't want to stop with that, though - Maybe I'll need another load in the future, or something even heavier comes out? I punched it up because I want it to run right, first, and than I figure out the loads later. My $0.02...

It's a great, great precision long range cartridge - if you load it heavy. I'm loading 225gr Hornady ELD-Ms at 2815fps at the muzzle, and the thing is still supersonic at 1800 yards... but only with a 500 yard zero on it... No 6.5 Creedmoor or .260 Remington can touch that, at that distance...

If that gas port needs to open anymore, we do it one drill-bit size at a time, until everything cycles. You won't be overgassed.

^^^ No shiit - that's what the RedHeads do...

I need a B-TAC V-TAC, brother - is that an option on the site?

Those two are an awesome combination. They're just getting it done, in Layman's Terms. I love it. "...that's the mirage. You can even see it in the snow..." How many times have I covered that, in the wind-reading classes... Their banter back and forth reminds me of shooting with Matt. I kid you not. "Hey, counting is HARD. So back up off of me..."

That gas tube is dead-nuts perfect, where it should be. These things are tricky. Mine would cycle my 147gr handloads just fine. It wouldn't even eject my 140gr handloads, wouldn't cycle the gun, wouldn't come close to picking up another round... Until I punched that gas port diameter up. Ran my 120 Barnes TSX loads just fine though, before drilling. These things are a fucker to figure out.

I don't think it's possible for the barrels to be that much different - it's still a .308 Win round that has to go through it. The DPMS G2 claims AR15 compatibility, but I don't know how far that goes on the upper receiver. I know they state you can use AR15 rails on it, but I think we've seen some differences in that "claim" here over time. If it uses the smaller AR15 barrel nut, then they did something with the upper to accomplish that... Did they shrink the OD of the barrel extension, too, to make that work? Not enough detailed info here on the G2s to be able to state anything with fact... Sorry, but there's not enough info here to confirm or deny for you. If you pull your barrel, and mic the OD of the barrel extension, and report back - then we can definitely tell you if that is different than the "common" .308AR barrel extension. That would be a step in the right direction, for confirmation.

LaRue MBT-2S, hands down. It's $80 right now for one trigger ($75 ea if you buy 3). You cannot beat that quality of a trigger for the money you shell out. It's badass.

Damn, Cliff - you've got some badass altitude on your side up there, ballistically-speaking. At altitude like that, you can get bullets to do impossible things, that they could never, ever do closer to sea level. That's awesome.

This is gonna be a sweet .308AR, right here. Rainier billet sets are gorgeous, and Proof barrels are just plain sexy...

Stick with the rifle buffer for now, until we get this sorted out. The rifle receiver extension and buffer are good to go. Get that spring replaced with an Armalite EA1095 recoil spring. That will give us a solid recoil system to work with here. How far into the upper receiver does your gas tube extend? It should stop in the center of the cam pin cutout. Get a pic of that, if possible. Is that LaRue low profile gas block adjustable? If so, set it wide open for now. If it's not - that's cool, too.

You using any kind of cleaner or polish in the corn cob media?

Doesn't look too bad, in that second pic. Can't see much in that first pic.

@Ravenworks where you at on this?... Since you're online, and responding to other people about other things... You got any say in this?... Or not.

I already told you, there is one company - ONE, company - that makes a lapping tool for the M5E1 Enhanced upper. There is only ONE company that does that. If you Google those specific terms, it'll turn up for you.

I got it - get off your Apple IPhone, and get on some kind of desktop computer - and upload your photos. That .HEIC extension is some kind of Apple IPhone thing. It's not working here. Phones aren't real computers, not matter how hard they try to be. Sometimes, it takes real computers to solve real computer shiit. I'm just sayin'...

You're pics didn't show for me. Try something else for attaching or uploading pics... I tried downloading your pics- and it didn't work. Something is going on there with that .HEIC file thing that you have going on...