98Z5V

My biggest accomplishment for the 25-45 will be to put the time in on my 100gr Barnes TSX-BT projectiles, and get that load squared away. I played with them, but I need to do alot more work with them. Once I solve that one, those 90 SGKs will be a thing of the past. Those Barnes 100gr TSXs will be the SHIIT...

I took that 25-45 out to 850 yards, but it was a challenge with the scope I had on it. PA 4-14 mil-dot scope, with a straight mount (Aero Precision) and no MOA built into that mount. With that straight-up scope mounting, I had about 10 mils of drop travel in the scope, in it's internal adjustment ability. Those shots on the 850 target required 17.5 mils of drop, for my 90gr Sierra Game King handloads - and they're moving, too. It was all experimentation, beyond those 10 mils of scope travel... It was holding mils in the reticle, until I got it there. It sucked to figure it all out, but once it was on - it was on. If I run a 10 MOA mount, that'll give be back about 3 mils of adjustment in the scope. 20 MOA mount will about get me there, with close to 7 more mils of drop in the scope. 20 MOA mount will just about get me where I need to be, just with dialing the elevation turret, at 850 yards. If I shift the thing to a 200-yard zero instead of a 100-yard zero, the 20 MOA mount will definitely get me on target at 850, dialing-only. That 25-45 is a beast out to 500 yards, on that 90 SGK load. That's all I ever wanted from it, in the beginning - split a coyote at 500 yards. After that range test on it, I want it to do better out there at more distance, though... That's gonna come down to scope mounts and zero distance...

For what it's worth, and all the Valk-Hype out there about it being some wonder-gun that's supersonic to 1300 yards... It's not. Hornady Black 88gr Match ammo, straight from the factory, is supersonic to 1100 yards, from an 18" barrel. You'll need a LOOONG barrel to keep that thing supersonic to 1300 yards... 12.5" Grendel with 123 handloads is supersonic to 900 yards. 16" Mk12 Mod H Grendel with that same load is supersonic to 950 yards. 18" SPR Grendel - same load again - is supersonic to 1000 yards. I'll take the Grendel, and the 35gr-heavier projectile... I don't know what load that the Valk-Crowd is hyping/claiming to be supersonic to 1300 yards, but it's not a 75gr Hornady or 77gr Sierra projo. It's not the 88gr Hornady projo. It's not the 90gr Sierra MatchKing, either. If it's the 95gr Sierra MatchKing - that thing needs a 1:6.5" twist barrel to stabilize it. The common 1:7" twist Valk barrels that are out there in the wild won't stabilize that projectile... My $0.02 on it all...

The most perfect, efficient cartridge ever developed for the small-frame AR, ever. And, I can compare that to the .224 Valkyrie, as well - only one of those, and there will only be one. This is truth. I have 5 myself - they BREED! Built a very sweet, very special one for @Matt.Cross, too. I built a Vakyrie to test "the hype" that's out there about how it outperforms the Grendel in every way... That's not true, when you look at it closely. The Valk with 88gr Hornady ELD-M Match ammo does indeed have a couple clicks less drop at 850 yards, and it is accurate as all hell - just like the Grendel running 123gr Hornady ELD-Ms is. The big difference for me is that the ballistics are almost identical, I'm delivering a 123gr Grendel round on target with a little (insignificant) more drop - and that's 35 grains more projectile-mass over that 88gr round. Both are Hornady ELD-M Match projectiles. I'll take the Grendel, every time. Built the first 18" Grendel, and it was SPR-ish, Mk12 as I could get it as far as important parts. Not a Mk12, but "SPR" instead. Stellar performance at 850 yards. Decided to build a short one, so I did a 12.5" Grendel. When it accurately, repeatably, went 850 yards with a 4x Leupold scope... every time... I was sold, for good, on that cartridge. Then, they started breeding...

Yeah, you're gonna need to bust that bitch down, brother. To the guts. It's a simple process, once you do it. 500 and 590 are identical in breakdown.

Not at all. Put a live round in the barrel/chamber by hand, but it's gonna fully seat - the chamber will be perfect. Lightly run a round in there with the BCG and finger pressure (upper only) and seat the extractor over the rim on the round. Should you check headspace on a .308AR? Always. I just described a way to do it.

Olight. If you guys haven't been checking them out, then you should. Olight is gonna give the big-money companies a monstrous run for their money. I started dabbling in this stuff over the summer. Sign up for their notifications. It's well worth it. https://www.olightstore.com/ I can tell you right now that this 1500 lumen weapons light is BADASS... https://www.olightstore.com/bundle-pl-pro-1-rpl-7.html The Mini Valkyrie is also BADASS!!! https://www.olightstore.com/pl-mini-2.html I'll get reviews and writeups coming on these. Already have them. Just need to get them out on a night shoot, get pics, etc. Olight is slaying big-name companies, with the quality and prices. They rock, men. Hard core, too.

This is a badass scope. I have one on the 6.5G M4. PA is blowing out some blems at $249, and that's from a regular price of $329. Black or FDE, your choice. https://www.primaryarms.com/pa-gen-ii-5x-compact-prism-scope-with-red-green-illuminated-acss-reticle-flat-dark-earth-blem https://www.primaryarms.com/blem-pac5x-genii-acss-5.56 They include zero data for Grendel - even though it's not in the title of the scope itself (it's in the instruction manual).

Absolutely amazing. You both deserve a round of honor.

Both are longer.

That's the damn truth...

Yeah, the AP bolt catch, and the threaded pins that Aero includes. For their receivers. CMMG won't include those threaded pins that you need. Oh, and CMMG parts in your gun will make your gun fail, over time, because they suck. @Robocop1051, looking out for you, brother. You run that UBR 2, with an AR15 H3 buffer, and the spring that I told you - the Armalite EA1095 spring - and your recoil system will NOT be a problem that you have in your gun. I guarantee you that, myself, and I'll buy the parts back from you if that's the problem that you're having. Full cost that you incurred, and I'll pay the shipping to me.

Alot of people think you need to chuck this thing up in a drill, and get after it. I do it by hand, no drill, turn it by hand with slight pressure, and look at it after a few turns. See what I'm getting, see what I need... Repeat until I have a fine silver circle all the way around. Several beers are required, on a calm night, but they all work out perfect that way, nothing is over-ground. Most QUALITY uppers these days don't require hardly anything at all on them, and they're good right out of the gate. You could leave them alone, and it wouldn't matter. My $0.02.

Here's my dope chart on that thing - you better tread cautiously if you try to duplicate this load data. I'm stating that right now. What works for me in my gun, might blow you and your gun up. You need to try your own stuff first in your own gun, and start 2.0 grains lower that what worked for me in my 16" gun, and work your way up, carefully. 16" gun throwing 1000 ft/lbs of energy at 600 yards with 6 and half mils of drop...

Mine's a fucking beast. I love that gun. I started loading it with Hornady 185gr GMX projectiles, but I moved up to Hornady 225gr SSTs. It's a damn monster. 16" barrel - and it recoils less than my 16" .308 Win AR. Go figure. They're almost twins, too, as far as operational parts go. I love it... I need to paint this damn thing... For the 225s, when I changed over from the 185s, I moved to IMR 3031 powder, and its been excellent. That's the same powder I use for my 45-70 handloads, on the 405gr projectiles. Why not double-dip...

Is this the Crosman BB gun? I've been wanting one of those things...

Nothing in that new VA politician's proposal will affect a County Sheriff. If that pipedream got passed, it could affect city and state police - but not a County Sheriff.

Nobody here has shown any pics of it yet, for sure. As far as I know, there is only one company that makes a tool that will do that job. https://www.gandgrifleworks.com/AR10-Lapping-Tool-p/arlapset.htm

That gives you some concrete information to send to Fail Zero, on what's happening, and get a new bolt from them. I think they need to change their name to Fail(ed) Once, now. Nib adds to dimensions - it's a coating. You have to undersize the part, and coat UP to the dimension, within the tolerances of the part. Or, just coat enough to stay within the tolerance on the part in the first place. This isn't the first time we've seen something like this here, with NiB.

Got a pic of what they look like? I can figure out what happened if I can see the brass, brother.

Dear Sweet Little Baby Jesus... this has been an amazing ride, through this thread. You are all mind-boggling, and have my respect.

That wasn't coated by the same guy, at the same time, as the one that you have now... refer back to my previous statement, here: Use the old bolt, and see what happens...

Same bolt and BCG, you're using in every gun?... Did I read that right?

Right after 12 minutes, they get into exactly that, and it becomes more interesting... Never be a quitter, brother... Never end the fight... Stick in there until the end...

Nickel Boron? That adds to the dimension of the part. Try a different bolt, that works in another gun. I wouldn't initially suspect a Criterion barrel, and I would suspect a Clymer headspace gauge. Use the bolt out of this one, in this build, and see what happens.