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Joined: May 2004
Posts: 56,097
Campfire Kahuna
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Campfire Kahuna
Joined: May 2004
Posts: 56,097 |
Call it what you wish. If I gave a chitt what you think I'd pull the pics and post them. I don't. The only systems still working on the bird were the power plant, drive train (perforated) and rotors (perforated). It was scrapped as non-repairable. None of the 6 on board were wounded which was a miracle in it's own right. Probability is just that and nothing more. Thats the typical response of someone full of chit. What is the AC's data tag number. I'll look it up. Single engine Huey, 176 small arms rounds impacted on a Huey with six onboard and losing all but drivetrain and power plant, not one person hit is impossible. You lost all comm/Nav and nobody took a hit? Haha you have been watching to many movies. The aircraft was scraped because of repairable small arms fire damage. Hmmm we have these really nifty things called Cabin and Tailboom fixtures. Hueys were originally designed to be thrown away but they soon realized how cost effective and easy it is to rebuild them. I have rebuilt a few from Colombia that have seen some serious damage. They were trucked to Guaymaral were we rebuilt them. Also Worked on the Hawk that struck a landmine on the mountain the FARC cleaned the landing spot for. Google Colombia Blackhawk hit by land mine you can see the video. Guess I forgot the tail number. Only been 48 years, excuse me all to hell. Mebbe you forgot something in the fine print. I did not say nobody was hit, I said nobody was wounded you silly phuoc. You have any familiarity with ceramic composite armor such as was in use back then? And that's about as much discussion as I have time for at the moment. ![[Linked Image]](https://i.imgur.com/tGq0211.jpg)
I am..........disturbed.
Concerning the difference between man and the jackass: some observers hold that there isn't any. But this wrongs the jackass. -Twain
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Joined: Jun 2008
Posts: 13,354
Campfire Outfitter
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Campfire Outfitter
Joined: Jun 2008
Posts: 13,354 |
Thats ok don't need the number. I got someone looking into your claim now. We'll see!
Eat Fish, Wear Grundens, Drink Alaskan.
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Joined: Mar 2004
Posts: 1,397
Campfire Regular
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Campfire Regular
Joined: Mar 2004
Posts: 1,397 |
There was a discussion going on on MontanaMarine's other AR post concerning the 7.62x39 in an AR15 breaking the bolt's locking lugs.
The thread was originally about AR pistols and not 7.62x39 in ARs, so I'll post this question here.
It was stated that 5.56 operating pressure is around 62K psi, and 7.62x39 is around 45K psi.
Based on surface area calculated by rim diameter of 5.56 case, at 62k psi, the force on the bolt will be 6,974 lbs.
7.62x39, using SAAMI spec pressure of 45k psi, will have a force of 7,058 lbs. on the bolt.
My question is.....
What about the 6.5 Grendel. Max pressure on it is 52K psi and it has the same .44" (.442" vs .447") rim size as the 7.62x36.
Has there been issues with the Grendel shearing off locking lugs?
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Joined: Sep 2001
Posts: 19,052
Campfire Ranger
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OP
Campfire Ranger
Joined: Sep 2001
Posts: 19,052 |
Having some mild weather here, so I got in some range time with the 7.62x39 this afternoon. Traffic was heavy but we made it through, ![[Linked Image]](https://i.imgur.com/Kg8qQbH.jpg) ![[Linked Image]](https://i.imgur.com/PyENrqL.jpg) Set up steel at 81 yards, ![[Linked Image]](https://i.imgur.com/Za9UNwq.jpg) Shooting Tula 122gr FMJ, ![[Linked Image]](https://i.imgur.com/fDNWarz.jpg) Shot about 60 rounds offhand, quick reaction drills. Only missed one round. At the end I turned the target around to the clean side, sat down and leaned against the truck tire, and fired a slow 10-shot group. ![[Linked Image]](https://i.imgur.com/ssbIbB4.jpg) View from the office, ![[Linked Image]](https://i.imgur.com/NlxFX7M.jpg)
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Joined: Nov 2006
Posts: 10,163
Campfire Outfitter
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Campfire Outfitter
Joined: Nov 2006
Posts: 10,163 |
Plenty good shooting!
I've got a Colt 6720 with an EO-Tech on it and Magpul SL hand guards. That pic makes me want to stick my DD Omega rail and a vertical grip on it, and break out the spray paint... looks good.
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Joined: Sep 2001
Posts: 19,052
Campfire Ranger
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OP
Campfire Ranger
Joined: Sep 2001
Posts: 19,052 |
That would be pretty similar setup.
My quad handguard is the broke-dick UTG Pro, but I must say it is nice and solid. The 7.62x39 barrel is essentially a heavy contour aft of the FSB, so it's a pretty chunky rig. I love shooting it.
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Joined: Dec 2002
Posts: 22,274
Campfire Ranger
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Campfire Ranger
Joined: Dec 2002
Posts: 22,274 |
I'm probably going to work up some handloads this winter and see if I can get a 125 or 150gr SST or Ballistic Tip to shoot consistently under 2 moa. I've had pretty good results with 1680 powder in a PSA KS-47, and also in a Ruger #1. Both would easily stay under 1½" for 5 shots. Using the Ruger I took one deer with the 123gr Hornady SST, and also some hogs with the Nosler 123gr, which were available at their Pro Shop for a while. Both are .310 bullets, and both are pretty frangible on game. I'd like to see somebody make a bonded 123gr bullet that holds together a little better. At some point I'll try the various 150gr .311 bullets in the Ruger, which has a long throat. FWIW 1680 also works well in the .218 Bee, and subsonic in the 300 BO.
"...the designer of the .270 Ingwe cartridge!..."
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Joined: Sep 2001
Posts: 19,052
Campfire Ranger
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OP
Campfire Ranger
Joined: Sep 2001
Posts: 19,052 |
Thanks for the info.
I've never used 1680, but I see it all over the load data for 7.62x39, and 300BO. Must be pretty good in those cases.
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Joined: Jul 2015
Posts: 14,682
Campfire Outfitter
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Campfire Outfitter
Joined: Jul 2015
Posts: 14,682 |
Shooter's World Blkout and CFE BLK are extremely competitive with 1680. Pick up a jug of any of them & you'll be very happy.
Politics is War by Other Means
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Joined: Sep 2001
Posts: 19,052
Campfire Ranger
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OP
Campfire Ranger
Joined: Sep 2001
Posts: 19,052 |
Took the 7.62 x39 to the Icebreaker to stretch it out a little. I was just shooting Tula 122gr FMJ. Shooting at a steel coyote at 465 yards, I was getting about 50% hits. Better than I expected from that ammo, and the 3X optic. Kind of motivates me to maybe work up a handload with a good bullet in the 155gr weight. The ACSS reticle worked out well at that distance. I didn't take it further due to the accuracy limitations. Also, you could tell by the sound of the bullet hitting the steel it was just about out of gas. That's the x39 on the bipod to the left. ![[Linked Image]](https://i.imgur.com/YKG6g51.jpg) ![[Linked Image]](https://i.imgur.com/4BtHcab.jpg)
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Joined: Jan 2008
Posts: 242
Campfire Member
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Campfire Member
Joined: Jan 2008
Posts: 242 |
Took the 7.62 x39 to the Icebreaker to stretch it out a little. I was just shooting Tula 122gr FMJ. Shooting at a steel coyote at 465 yards, I was getting about 50% hits. Better than I expected from that ammo, and the 3X optic. Kind of motivates me to maybe work up a handload with a good bullet in the 155gr weight. The ACSS reticle worked out well at that distance. I didn't take it further due to the accuracy limitations. Also, you could tell by the sound of the bullet hitting the steel it was just about out of gas. That's the x39 on the bipod to the left. Is that a PA optic on your 7.62x39? How does it feed, I heard of some jams with the very early ones. It's would make a neat deer rifle.
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Joined: Jan 2008
Posts: 242
Campfire Member
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Campfire Member
Joined: Jan 2008
Posts: 242 |
Something I've realized lately is that my eyes are not what they once were. I'm 57, wear bifocals. Through the reading lens I can get a clear front sight, but cannot see anything downrange. Through the upper lens, I can only get a blurry front sight, but I can see downrange. I like the basic simplicity of the irons, but reality is I can shoot about 3" with optics, and 6" with irons, at 100 yards. That's with this carbine and Tula ammo ![[Linked Image]](https://i.imgur.com/DM244TB.jpg) I saw that you're using the 5X PA. BTW I'm 55 years old and the VA gave me trifocals. I told the young lady lab tech "they must be mistaken, 50 is the new 30.". She said no Sir you need trifocals.". The "Sir" part made me feel very old lol.
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Joined: Sep 2001
Posts: 19,052
Campfire Ranger
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OP
Campfire Ranger
Joined: Sep 2001
Posts: 19,052 |
GoForBroke,
The 7.62x39 has the PA 3X Prism sight with the ACSS reticle calibrated for the 7.62x39 out to 600 yards.
Mine has been feeding flawlessly. I'm using the ASC 20 round magazines.
My odometer just rolled over to 58. No doubt the eyes start to show their age.
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Joined: Jan 2008
Posts: 242
Campfire Member
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Campfire Member
Joined: Jan 2008
Posts: 242 |
I think the 3X's Prism was one of Dimitri's favorites. One of these days I want to look down their 1-6x and 4-14x. Good info on this thread. Thanks.
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Joined: Sep 2001
Posts: 19,052
Campfire Ranger
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OP
Campfire Ranger
Joined: Sep 2001
Posts: 19,052 |
I've got the PA 1-6x24 on another AR (5.56) . it has the ACSS reticle that goes to 800 yards. I haven't had it a long time, but no complaints so far. You can see part of it in the last pics, laying on it's side on the ground.
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Joined: Jan 2008
Posts: 242
Campfire Member
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Campfire Member
Joined: Jan 2008
Posts: 242 |
Do you have any trouble seeing rats with that 1-6X? If you get a 4-14X I'd be interested to see how you compare the glass to your SWFA 12X.
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Joined: Sep 2004
Posts: 17,390
Campfire Ranger
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Campfire Ranger
Joined: Sep 2004
Posts: 17,390 |
Do you have any trouble seeing rats with that 1-6X? If you get a 4-14X I'd be interested to see how you compare the glass to your SWFA 12X. Probably good enough for Democ-rats
“Live free or die. Death is not the worst of evils.” - General
John Stark.
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Joined: Sep 2001
Posts: 19,052
Campfire Ranger
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OP
Campfire Ranger
Joined: Sep 2001
Posts: 19,052 |
Do you have any trouble seeing rats with that 1-6X? If you get a 4-14X I'd be interested to see how you compare the glass to your SWFA 12X. I haven't looked at a prairie dog through it yet. At 6X it should easily be enough for 200 yards. It has that chevron reticle for the zero point. That lets you hold on anything you can see without covering it up. Past 200, the AR-15 (my AR-15s anyway) isn't really precise enough for serious PD's shooting anyway.
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Joined: Nov 2003
Posts: 18,300
Campfire Ranger
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Campfire Ranger
Joined: Nov 2003
Posts: 18,300 |
GoForBroke,
The 7.62x39 has the PA 3X Prism sight with the ACSS reticle calibrated for the 7.62x39 out to 600 yards.
Mine has been feeding flawlessly. I'm using the ASC 20 round magazines.
My odometer just rolled over to 58. No doubt the eyes start to show their age.
How many rounds do you have through the 7.62 x 39 AR now? Its an intriguing project with the inexpensive ammo prices at 18 cents a round. You just got the PSA upper and put it on a std lower correct?
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Joined: Jan 2008
Posts: 242
Campfire Member
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Campfire Member
Joined: Jan 2008
Posts: 242 |
I've been pretty lucky building my AR15's. Sub moa so far without free floating. M4 was around 1/2" @100 yards and my HBAR with minimal load work up around 1/2-3/4" @ 100.yards. Pretty consistent to 200 yards on rats and 400 yards on chucks. I'd download my coldbore headshot @ 400 yards on a chuck pics but they say the file is too large.
Last edited by GoForBroke; 04/16/19.
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