98Z5V

Gas port diameter in the gas BLOCK... Check that for 0.125"...

Pete, here's what I see from the data above. Question first, though - is this gun ALWAYS going to live suppressed, and shoot the 200gr projos? That will simplify the process, if it's a Yes... Then, we don't have to worry about getting it operational for lighter supers, and no can... 8.2" with pistol gas. I don't even think Carbine gas would fit on this barrel length - not enough barrel. 0.0855" initial gas port diameter. Went to #43, 0.089". Went to #42, 0.0935". Buffer / recoil system never changed, in initial tests. Case dispersion never changed, all in the same area. ^^^ Data gathered. Observations. 300BLK can be a MFer to tune right. That's a fact. Too much recoil system, and not enough gas port diameter. Even though the ejection pattern fits the clock-mold that's on the internet - ejection didn't change, with increasing gas pressure through port diameter increases. Max you can go on a gas port diameter is 0.125". Eighth of an inch. That's because 0.125" is the max ID of a common gas tube, and the max ID that gas block ports are drilled to - for that very reason. Anything over 0.125" wouldn't matter, because then you'd have the gas tube ID as the restriction. When gas port diameters for a barrel config are starting to get close to 0.125", that's usually when barrel manufacturers up the size on the gas block journal dimension. 0.625 pencil journals grow to 0.750" journals, then 0.825", then 0.936" journals... Those are the 4 common sizes. Now, you DO have an adjustable gas block on there, already - so there is no penalty in doing what I'm going to recommend... First, I'd just put a standard AR15 Carbine buffer in there (3.0oz, 3.250" length) with a regular carbine buffer spring. Test the gun, and look for the cyclic operation to change, or the ejection pattern to change - see of that makes a difference. If that makes a difference, we got somewhere. If it does NOT make a difference, I'd go straight to blowing that barrel gas port diameter to 0.100", or as close as you can get to it, and rest with the lighter recoil system still in there - and look for changes in cyclic operation or ejection pattern. 0.100" should be a #39 (0.0995") or a #38 (0.1015"). There is zero penalty in doing this, and punching big, because the gun already has an adjustable gas block that can be dialed back, from wide open, in case that diameter is too much...

Found even more info and data, whilst tripping down this rabbit hole... https://press.hornady.com/release/2012/04/20/ballistic-gelatin-mixing-procedures-practiced-by-the-fbi/

First thing getting tested. 5.56mm Mk262 clone loads using Hornady 75gr HPBT projectiles. One from a 1:7" twist, and one from a 1:5" twist. Controls: Both barrels are made by KAK Industries, 12.5" midlength gas barrels, 5.56 NATO chambers. Won't get more comparative than that. The 7 twist barrel is steel, the 5 twist barrel is 416 stainless, otherwise, twins. Gonna be a good test.

Yep, fellas, we're about to get into Ballistic Gel Testing. I've always wanted to try it out, so it's getting figured out. First shots downrange in the next month-ish. I'll add to this as it gets going, but I'll discuss the research now, here - it's alot more complicated than it appears. I see why people drop the money to just buy a gel block, instead of making it at home. The most common size for a block is 16 x 6 x 6 inches. I found some suitable containers on Amazon to use as molds, and have two of them. That dimension holds 2 gallons of water. The prices for gel blocks is pretty crazy, anywhere from just under $100, to about $250, for that size block. Depends on what you find, and from where. There's a place called Clear Ballistics that has the FBI block for $90. It's gonna cost you about $40 to make one block. Obviously, 10% ballistics gel is 1 part gel mixture to 9 parts water, by weight. Water weighs 8lbs per gallon, so that's right at 130 ounces as a round number. Gotta have 13 ounces of gel powder to 117 ounces of water - per gallon. By weight, that comes up to 8.125 lbs. Good enough to mix. The 16 x 6 x 6 block molds will need 2 gallons of water. Knox gel, commonly used for this is about $20 per 16oz container, when you buy bulk. Found a 6 pack of that on Amazon for just under $120. You can't find 16oz containers in the grocery store... A ONE OUNCE little tiny box of this stuff will cost you about $3 at the grocery store... The 6-pack of 16oz containers = 96oz total / 13oz of gel mix per gallon = 7.38 gallons of this stuff I can mix up... almost 4 blocks of it, for just under $120... So, there's alot more to just making this and using it as Ballistic Gel than meets the eye. You measure everything out, heat the water to a certain degree, mix in the gel powder a certain way, stir it all in for a certain amount of time, pour it into your molds, then refrigerate it at a certain temp for a certain time... Yeah... I've seen times for refrigeration anywhere from 36~72 hours. THEN, when it's done, you need to KEEP it at 40* F until you're ready to use it / shoot it... According to FBI Protocol Testing, you shoot it from a distance of 10 feet from the muzzle. That's a tick more than 3 yards... Skin is tough, so the first 4" of penetration are supposed to equal the pressure of puncturing skin - and you ignore those first 4" when looking at the results, but trying to get a visualization of what the terminal ballistics are going to look like in real tissue... It's a pretty wild process. Here are a couple articles about it all: https://www.hornadyle.com/resources/fbi-test-protocol https://g9defense.com/blog/ballistic-gelatin-testing-5-things-to-understand-ballistic-gel-testing-a-comprehensive-guide/ It's coming... I promise you... and it's not going to be long from now...

@JBMatt, Willy Nilly, my man. Let it rip.

MAAAAAAANNNN.... This thing is gonna be badass... Refer to my .243 Win post about the new STAG-10 stuff from Aero Precision. I pulled another tungsten-cerakote set as soon as I laid eyes on that RAL-8000 set that I got for the .243. The receiver sets are AMAZING. Aero should do to their M5 stuff, what they're doing for STAG Arms. They're fukking SWEET! Here's the rundown. I've been running my .260 Rem since 2018. Here's my original .260 Remington. I built it that spring, developed the load, and fired it up, that summer. @Armed Eye Doc made us all some custom ejection port doors for that 2018 Fall Shoot, and that went on the gun, for sure. That ejection port door cost @JBMatt about 2 grand... Glad I already had a gun to put it on... Matt was pissed... LMAO. That original gun has NEVER been anything but stellar. It's a fukking Rock Star. Well, back in the Kim-Days, when she was here, and didn't go Ballistic Bat-Shhit Psycho again, I build her a clone to that gun. She went completely apeshiit before Christmas 2022, so she didn't GET that gun for Christmas 2022... Oh well. When I jumped on the Aero STAG-10 contract overrun stuff, got the first one, received it, and saw how well it was made - I ordered another set the very next day, in Tungsten cerakote. Right away. The plan was to just stash it away - because, something will happen. Right? I started thinking about it. After it was in my hands, and it's so sexy. Let's just rip down Kim's .260, and straight rebuild it on this new tungsten receiver set! I'll shoot THE SHIIT out of THAT THING!!! Plus, the first .260 is getting a little long in the tooth... Maybe the first .260 - it's zero'd, ready to go - that one is the new backup .260. Yeah, I like it. So, to be transparent, and not lie. I stole the Athlon scope and the Armalite mount off the Mk11 gun, just for this. I need a dedicated LaRue mount and another Athlon scope, to complete this gun - but I swiped that shiit so I can zero this gun, confirm my handload is the same, and run it in the Heavy Metal category in the May match... This gun is complete, 100%, minus having it's own scope and mount. This is the new .260 Rem... Proof of Life - the old .260 is sitting behing the new .260 in this pic.

This caliber has been a box that I needed to check, in Large Frame Gas Guns, for a very, very long time...

So, Aero Precision makes the STAG-10 Large Frame hard parts. If you're not on Aero's email list, then you never knew that. When Aero had too many left over Stag parts, they launched a "Contract Overrun" email, and were blowing these things out. It went down beginning of this year, Jan. I jumped on the STAG-10 matched receiver set for $199. You could grab the 13.5" rail for $124. Under $330, and you get a matched upper and lower, Large Frame, WITH a rail. Yes, please... When I ordered it, picked RAL-8000 cerakote (the HK416 color), and it took a month for it to come in - and I was blown away with the quality, when it arrived - and the departures from M5 - that Aero was doing. AS SOON AS... this receiver set came in, I jumped right back in on the website, and ordered another set, in Tungsten cerakote. More on that later... So, when you ordered the receiver set for $199, you could add the MagPul MOE rifle stock for $9.99. Not a typo. The STAG-10 stuff has proprietary pivot and takedown pins, and they are INCLUDED. The upper already had the forward assist and ejection port door installed. When you add it up, you got the upper, lower, rail, and a MOE rifle stock, with upper parts and pins, for $360 - SHIPPED!!!... WAY UNDER half price. I'd been eyeballing this gas gun project for several years. Wilson Combat is my go-to for weird caliber barrels. Both my .260 barrels, the .358 Win barrel, the .338 Fed barrel, the 7mm-08 barrel - all Wilson Combat match barrels. Wilson was my go-to for this kind of stuff, but they only did a 16" .243 Win barrel with their own proprietary gas system length. Eh, I wanted more, but if it's not available, I'll go there. If I have to. So, the receiver set and rail was ordered, done. Couldn't pass it up, no fukking way. I get an email from Ballistic Advantage that they're doing .243 win barrels, 18", and I ordered it THAT DAY. Bonus, what I wanted anyway. Hanson profile, comes with a pinned gas block, brand new offering, and about half price because it's new from them. We're just falling all OVER deals here... Struggled to find a VG6 6.5 Gamma brake for this, but found one on another half-price deal, for the older model. VG6 brakes are OOS everywhere, for just about everything... It's got @JBMatt's Ballistic Engineering AR Accurized trigger, and a Battle Arms BAD-ASS PRO safety. It still needs that BCG, charging handle, mount and optic - but it's gonna be a badass 6mm .308 Win gun. Needs it's own bipod, too, and that'll come. Updates in the future, as this thing gets closer - it's so close right now, it's not even funny...

So, this has been a hole in my Large Frame AR Game for a long time. Before you start wild-catting crazy new shiit, there are 6 basic cartridges made from .308 Win. 1. Obviously, .308 Win Largest to smallest caliber: 2. .358 Winchester. Checked that box, and it's recoil heavy. I need to work on that one, and it's already got the heaviest buffer that Slash makes. It's a monster. Gonna need an adjustable gas block for that psycho fukker. It's nuts. Running 250gr projos, and just might back those down. It's insane. 3. .338 Federal. The Pig Puncher. 16". This thing is a dream, and it shoots softer than the 16" .308 gun that's it's sister-gun, and it's running 225gr Hornady SSTs. It's wonderful. (Skip .308 Win, the Parent Cartridge - I have a PILE of these things) 4. 7mm-08. Man, this thing is still a work in progress, and I need to figure out a load. It's an 18" barrel, and it's gonna be the long-distance winner from all the .308-based guns. Needs load development. 5. .260 Remington. Man, do I have an update for the 260!... It's the current slayer. Little more case capacity over 6.5C, little more speed than a 6.5C - it's just superior to the 6.5C, in every aspect. Big news coming for the 260... The most accurate Large Frame gas gun that I own... Hands down. It's just stupid accurate. 6. Final cartridge, based on the original .308 Win. The .243 Winchester. The .308 Win necked down to 6mm... I've had a .243 bolt gun for awhile, and it's sweet. A Rem 783 26" heavy barrel, Varmint model with a beautiful wood stock, and it's damn nice. Got it before Remington went under. But, I've been missing a .243 Win for a gas gun. If I'd just build a gas gun, I'd complete the family of cartridges that were originally spawned from the venerable .308 Winchester cartridge... It's not done yet, but here's the backbone of it. I still need a BCG, charging handle, scope, and scope mount. Otherwise, it's almost ready. Build list in next post.

Okay - that guy Sheppard. In the first few minutes of the video, he calls a reticle, a "RETICULE..." Warning signs. A RETICULE is a woman's handbag, with drawstrings... Here's a RETICULE... THEN... At around 39 minutes in that vid, he states that HE'S NEVER FIRED the rifle... What?!!? He's a bankroller. Moneyman. Nothing more. The warning signs were there...

^^^ THAT is not good... At all...

It's all about Density Altitude, in making the 2 mile. 4.4 miles is just more luck, than skill...

I don't even want to think about what that gun would cost - or the brass would cost, or the reloading would cost. .375 CheyTac is the answer for 2 miles. 3520 yards. Two miles. Let's do that first. Get 2 miles. We might be able to get a .338 LM there, but we'll need higher elevation for the base shot... We need land near Flagstaff, AZ, around 7k feet...

We're bustin' 100* already. Fukc. 🥴 Last time we were at 100* in early April was 2014. FML...

@JimK1075, HELL YEAH, MAN!!!

White Wolf Capital Management, LLC, is the group of investors that bought Aero Precision, Ballistic Advantage, and VG6. They don't own Aero anymore...

Johnny B. Thunder Thursday. LET IT RIP, JOHNNY B!!!

That just means we have work to do, brother. You know we have the distance to try... Get after it...

One of my favorites, brother. For real.

WAAAAIIIT for it... It's coming...

Lemme give you all the hint, and it's a direct pic from that article I linked... What tent is that?... It's gonna break - the word will get out. Guarantee it.