Considering the op doesn't have modified buttress thread, the torque applied to such a thread isn't relevant. Might as well be discussing how much your rifle weighs on jupiter.
Barrel Torque
- Thread starter peterdobson
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All I did was correct a slightly incorrect post.
I've read it was to improve cold bore accuracy.Ok ! I’m a 100 lb max guy ! WHAT is the point of the modified thread type and super high torque values such as 500 plus foot lbs torque ? What is it gonna do for you ? WHY WHY WHYRJ
And that they do. LE snipers don't get fowling shots.
I understand, but I think the subject is off topic, because it doesn't relate to a Rem 700 which the op has, and that needs to be emphasized, or perhaps not necessary. Sorry, didn't mean to criticize you. That wan't my intent.
4ft if its even that long. And thats on 1inch bolts or smaller. So I don't see why a hardened receiver can't take 500ish.
Yes, the flat surface on one side of the thread allows higher torque where required. I don't really see a need on a rifle, but I guess it it works it works. Have to agree with the BR guys though, if it was a big improvement you would see it on BR guns all down the line. - dan
This is not being done to Remington 700 actions and I doubt it is being done to any actions other than Tac-Ord. They have created a special set up and thread so basically it is extremely difficult for a normal gunsmith to rebarrel one of their actions... and suggesting an accuracy gain. Good for them, good for their business. Us normal folk will have to get along with the industry standard using 60 degree threads and normal torque values.Ok ! I’m a 100 lb max guy ! WHAT is the point of the modified thread type and super high torque values such as 500 plus foot lbs torque ? What is it gonna do for you ? WHY WHY WHY
Just to settle my curiosity, I have an Enfield action ring which I thought would be acceptable. It's all that was left from an action which was destroyed by court decree almost thirty years ago. I saved it for checking threads on tenons I was cutting. Won't be doing more so it became a donor.
I used a take off stub barrel which I had on hand for similar purposes to screw into the receiver.
The first issue I had with it was clamping the barrel tight enough to hold the barrel after appx 200 ft lbs. Then, before I reached 300, the barrel itself started twisting. I don't mean slipping in the clamps, it actually twisted. Not only that, the receiver face started deforming/bulging.
Not only that, my action wrench, which uses the internal lug faces started twisting.
The torque wrench I used has a 48 inch handle and I used to use it for torquing the nuts on high pressure/high volume air compressors. It maxes out at 500 ft lbs but I've never needed to torque that high.
I wonder what else is "different" about the Tac-Ord receivers. Likely metal type as well as very specialized tooling?
I used a take off stub barrel which I had on hand for similar purposes to screw into the receiver.
The first issue I had with it was clamping the barrel tight enough to hold the barrel after appx 200 ft lbs. Then, before I reached 300, the barrel itself started twisting. I don't mean slipping in the clamps, it actually twisted. Not only that, the receiver face started deforming/bulging.
Not only that, my action wrench, which uses the internal lug faces started twisting.
The torque wrench I used has a 48 inch handle and I used to use it for torquing the nuts on high pressure/high volume air compressors. It maxes out at 500 ft lbs but I've never needed to torque that high.
I wonder what else is "different" about the Tac-Ord receivers. Likely metal type as well as very specialized tooling?
Lol. I seen a LE barrel that was twisted trying to get it off. Fellow kept the barrel around just to show people. I just put a LE # 4 on and it took all I had with a 2 ft bar to line it up.
Well at least you know your vice and wrench have good grip, no slippage.
Tactical Ops uses Rem 700 actions that they modify.
I've got more than "one" twisted barrels from Lee Enfields. The rifle I was writing about was a P17 action, or Pattern 1917 Enfield. Much more robust.
Are they getting "unthreaded actions"???
There isn't much metal left after the original threads are removed.
I'm not sure. This is just what I read online.
I have been watching this thread with interest.
One of our CGN members that I know well owns a TacOps F51 in 308.
I have shot this rifle several times, and can confirm that it is built on a 700 action, although I have no idea what the Krieger barrel is torqued to.
Cat
I remember the use of the Spiraloc thread, for which there were all sorts of claims. When a company talks about things like a modified buttress thread, I'd like to know how it is modified. As far as the 500 ft pounds goes, OK, it's their story. I'd like to see the action wrench they use.
I recall one company which claimed barrels were threaded to an interference fit, the receivers heated, and the barrel cooled, then they were spun together, and it was not intended that they ever be taken apart. Well, it happened that one came to me to recontour. I told the owner the barrel might not come off, but I could try if he wanted. He did, so I did. The barrel came off just like any other rifle. I guess it missed out on the special treatment. Recontoured and put it back on just like any other. Gave it all I could with the 18 inch flex handle. pretty tight, but not 500 pounds. Shot good.
A couple months back, I pulled a barrel off which I had installed on a Wichita action in 1982. when I put it on, used my usual torque system (same bar). Back then, I was in my early thirties and pretty fit. I didn't pull all I could but put it on pretty damn tight. Well, come 2025 and I tried to break it loose. Nothing. I added another two feet to the bar and pulled as hard as I could. It broke loose with a bang. I don't know what the torque was when I put it on, probably about 150 pounds or so. It probably took three hundred to break it loose.
I recall one company which claimed barrels were threaded to an interference fit, the receivers heated, and the barrel cooled, then they were spun together, and it was not intended that they ever be taken apart. Well, it happened that one came to me to recontour. I told the owner the barrel might not come off, but I could try if he wanted. He did, so I did. The barrel came off just like any other rifle. I guess it missed out on the special treatment. Recontoured and put it back on just like any other. Gave it all I could with the 18 inch flex handle. pretty tight, but not 500 pounds. Shot good.
A couple months back, I pulled a barrel off which I had installed on a Wichita action in 1982. when I put it on, used my usual torque system (same bar). Back then, I was in my early thirties and pretty fit. I didn't pull all I could but put it on pretty damn tight. Well, come 2025 and I tried to break it loose. Nothing. I added another two feet to the bar and pulled as hard as I could. It broke loose with a bang. I don't know what the torque was when I put it on, probably about 150 pounds or so. It probably took three hundred to break it loose.
If buddy ever removes the barrel, please post photos of the barrel tenon thread so we can get a good look at it.
Jonnyofalltrades
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Nailed it.
I've never had to torque anything up to 500ft pounds. It's hard enough torquing the nuts on compressor heads to 325 ft pounds, even with a 48 inch wrench, set to "snap" at that point. It was about all I could handle back then. 80 to 100 nuts, depending on how many heads, may not seem like much but when it's done, you know you've had a workout.
I suspect they're using hydraulics, both for applying torque and on the clamp blocks.
I've never seen the nuts on transport trucks being torqued. In such cases, likely large pneumatic impact guns?
It's no wonder they call for a repair truck to change a tire, or if it flies apart just coast it into the nearest facility.
That would mean those service trucks have compressors on board capable of some very high pressures, unless they're also using hydraulics.
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Knowing my friend as I do, I am fairly certain that if any work is done to that rifle, it will be going back to Tac- Ops themselves to get any barrel work done .
Cat
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