Anybody here ever played with Teludyne-modified rifle barrel?
I have no affiliation with the company whatsoever. I was so impressed by the technology and the owner's generosity by allowing me to hone LRS skill with tons of 300 winmag rounds that I promised him I would put the word out. I say what I mean and do what I say so here goes:
From the website: "The StraightJacket™ eliminates barrel whip, draws out barrel heat and brings recoil under control"
I am a trained skeptic due to previous engineering work where we had tons of sales contractor pitching the latest pixie magic dust. The premise seems simple: Wrap the barrel with a high grade heat sink so the barrel is at constant temperature closest to cold bore. Consistency in variables ie. temperature translates to accuracy. However, the fact that the straightjacket mod eliminates all barrel free-floating I thought accuracy would go south as a trade off for faster cooling. I thought wrong. Shot 10 rounds back to back then stuck a finger into the chamber. It was just as warm as the sun on my skin. Not much heating on the barrel either. Certainly not enough to cause mirage and distort view through the scope. Perhaps even cool enough that the round can be left in for long time without adverse effect at long distance. I had a phobia when it comes to 300 winmag after a cruel co-worker let me shoot his feather-weight hunting rifle chambered in that caliber the first week I started to learn how to shoot many years ago. I was proven wrong again with my recoil anticipation. It was like shooting match service rifle in 5.56 offhand. Nothing more. Finally, the accuracy was wunderbar still even without free floating. The overall group below ain't that great. I didn't have good sock, flimsy rest, sweaty cheek kept slipping, and my PRK-shaven cornea was burning as sweat got to it (enough excuses yet? ) While I was in the zone though, the three shots in the middle occured. Two of them shared just about the same hole. I have no doubt the rifle (barrel mod) is capable of 1/4 MOA easy. The weight increase from the mod was not significant.
Once I've saved enough ie. recovered from the OBR project, I plan to get a cheapest savage with accutrigger and get its barrel Straightjacket-ed
__________________
"we also rejoice in our sufferings, because we know that suffering produces perseverance; perseverance, character; and character, hope" Rom. 5:3-4
"So we can suffer, and in suffering we know who we are" David Goggins
"Aide-toi, Dieu t'aidera " Jehanne, la Pucelle
Der, der Geld verliert, verliert einiges;
Der, der einen Freund verliert, verliert viel mehr;
Der, der das Vertrauen verliert, verliert alles.
Maybe I missed one too many thermodynamics classes, but last I heard, the heat generated from the burning of propellant has to go somewhere.
If the bore is not hot, and the outside is not hot, where did the heat go? Magic?
TR
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"It is not the critic who counts; not the man who points out how the strong man stumbles, or where the doer of deeds could have done them better. The credit belongs to the man who is actually in the arena, whose face is marred by dust and sweat and blood; who strives valiantly; who errs, who comes short again and again, because there is no effort without error and shortcoming; but who does actually strive to do the deeds; who knows great enthusiasms, the great devotions; who spends himself in a worthy cause; who at the best knows in the end the triumph of high achievement, and who at the worst, if he fails, at least fails while daring greatly, so that his place shall never be with those cold and timid souls who neither know victory nor defeat." - President Theodore Roosevelt, 1910
I wonder how sturdy the "thin external jacket" is??
Would it hold up to bumping around in the night during a heavy PLF landing??
Do you have pictures of your weapon? before vs after?
What is the "new" barrel diameter??
Quote:
Originally Posted by The Reaper
Maybe I missed one too many thermodynamics classes, but last I heard, the heat generaterd from the burning of propellant has to go somewhere.
If the bore is not hot, and the outside is not hot, where did the heat go? Magic?
TR
You got me there. I'm not throwing a sales pitch so you'll have to take those questions up with the manufacturer. Just a lead slugger here reporting what he saw and felt. Another shooter, after sticking his finger in the chamber, said that it defied the law of physics. I'm tempted to speculate on the heat transfer gradient but I didn't stay at Holiday Inn, so that's a no go. I did get an A and B in Thermodynamics I and II though
Instead of waiting to procure a savage, I'm now asking the owner to see if he's up for the challenge of straightjacket-ing an AK74. If it comes back a repeatable sub-minute shooter, I'm sold
__________________
"we also rejoice in our sufferings, because we know that suffering produces perseverance; perseverance, character; and character, hope" Rom. 5:3-4
"So we can suffer, and in suffering we know who we are" David Goggins
"Aide-toi, Dieu t'aidera " Jehanne, la Pucelle
Der, der Geld verliert, verliert einiges;
Der, der einen Freund verliert, verliert viel mehr;
Der, der das Vertrauen verliert, verliert alles.
Location: 18 yrs upstate NY, 30 yrs South Florida, 20 yrs Conch Republic, now chasing G-Kids in NOVA & UK
Posts: 11,901
Quote:
Originally Posted by frostfire
You got me there. I'm not throwing a sales pitch so you'll have to take those questions up with the manufacturer. Just a lead slugger here reporting what he saw and felt. Another shooter, after sticking his finger in the chamber, said that it defied the law of physics. I'm tempted to speculate on the heat transfer gradient but I didn't stay at Holiday Inn, so that's a no go. I did get an A and B in Thermodynamics I and II though
Instead of waiting to procure a savage, I'm now asking the owner to see if he's up for the challenge of straightjacket-ing an AK74. If it comes back a repeatable sub-minute shooter, I'm sold
So would 1,000,000 AQ's.. An AK gas port and COOL does not compute..
I'd be a inclined to see if they would tackle something less strenuous,, like a M2A1?? Or one of my GF's toys??
__________________
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"May you be a half hour in heaven before the devil knows you’re dead"
I know, I know....gun writers. Wait till I get my hands on the straight-jacketed AK74. I'll post AAR and groups. Oh, the owner told me they drive a truck over it and it still shoots. I'm not going to test that one
__________________
"we also rejoice in our sufferings, because we know that suffering produces perseverance; perseverance, character; and character, hope" Rom. 5:3-4
"So we can suffer, and in suffering we know who we are" David Goggins
"Aide-toi, Dieu t'aidera " Jehanne, la Pucelle
Der, der Geld verliert, verliert einiges;
Der, der einen Freund verliert, verliert viel mehr;
Der, der das Vertrauen verliert, verliert alles.
FWIW: Remington tried the sleeve concept to stiffen a lightweight barrel over 20 years ago. Accuracy was phenominal, just not very good looking. Other than going through SOTIC not sure one would need the cooling aspect on a BA. Think I would rather put the money in a good barrel, doubt a factory hammer forged sporter barrel will go much further than 4K rounds.
So would 1,000,000 AQ's.. An AK gas port and COOL does not compute..
I'd be a inclined to see if they would tackle something less strenuous,, like a M2A1?? Or one of my GF's toys??
So they took the challenge....and it (barrel, chamber) was cool indeed. Well, warm I should say, but never hot. Will post range report later
EDIT: manufacturer tested it with magnified optics and sandbag at 100 yds. I was told they got 2MOA and less with 60gr wolf ammo. Having seen the improved group from the straightjacketed AR and bolt rifle, I have no reason to doubt this.
My own test uses red dot and Grip pod. I aim for practical accuracy, by testing it in a platform it will be used and using the worst group (including flyers). Ammo includes surplus, wolf, and silver bear. I got 1 inches and less with most touching at 25m, 2inches at 50m, and 4 inches at 100m. Well, no sub-MOA performance, but I consider minute-of-man to ~4 MOA a noticable improvement. Also, while I'm sure there are some solid 2MOA accurate factory or custom Ak74 out there, the straigh jacket delivers consistent group from round 1 to 5, as well as 151 to 155, within 30min. I doubt the original AK74 pencil barrel can be that consistent.
__________________
"we also rejoice in our sufferings, because we know that suffering produces perseverance; perseverance, character; and character, hope" Rom. 5:3-4
"So we can suffer, and in suffering we know who we are" David Goggins
"Aide-toi, Dieu t'aidera " Jehanne, la Pucelle
Der, der Geld verliert, verliert einiges;
Der, der einen Freund verliert, verliert viel mehr;
Der, der das Vertrauen verliert, verliert alles.
) While I was in the zone though, the three shots in the middle occured. Two of them shared just about the same hole. I have no doubt the rifle (barrel mod) is capable of 1/4 MOA easy. The weight increase from the mod was not significant. 
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