Barrel Nut Disadvantages?

[urbanrifleman]

As I said, it was in jest, a joke, I intend mean for you to take it personally.

I mean... Why would I?

 

[Carl S]

I have fitted barrels with the nut and fitted barrels that have replaced a barrel with a nut.

 

[SKWERLZ]

You kind of made my point. The least of the factors is the nut. That bullet doesn't know any different between the two.

The biggest factor is the barrel blank. A screamer blank makes a screamer barrel.

Yea
That’s my position on this.
Blank and then machining are the important factors.

Nut vs shoulder is probably inconsequential.

 

[Carl S]

I haven't seen or been told any advantages of accuracy increase or decrease with either.personaly I don't like them..question.. is the nut another variable to contend with..tennon thread with another thread for a nut.is it pulling the barrel off square when tightened.is the nut stretching the tennon thread more than a straight machined shoulder does.personally i think it's another variable to contend with.if it starts to win matches and shrinks aggs that's great.

 

[Fuj]

Getting ready for the Anderson Creek season. As I've said in the
past, I no longer use a nut. Arguably (as this thread has shown),
a shouldered barrel is superior in many ways......Of course in my
opinion.....

Brux on a Savage PTA. Life is good.....

 

[jackieschmidt]

Well, I took a little time at work this morning and made the nut. 1.250 20tpi, 1.5 hex.

 

[urbanrifleman]

Well, I took a little time at work this morning and made the nut. 1.250 20tpi, 1.5 hex.View attachment 1429239View attachment 1429240

That's gorgeous !!

 

[swd]

I say have an arm wrestling match and duel after the test shooting is done.

And there will still be another 20 pages of debate…..

 

[rijndael]

And there will still be another 20 pages of debate…..

Because a single win against your opponent isn't statistically significant. Someone would need to win 20-30 times before it proves anything.

Sorry ... I can't help myself.

 

[swd]

Because a single win against your opponent isn't statistically significant. Someone would need to win 20-30 times before it proves anything.

Sorry ... I can't help myself.

And there in lays the problem. If your looking for the truth there is no opponent, just facts. No need to be on a side pushing for one or the other to be more accurate.

 

[LVLAaron]

Jackie, you plan on having two sets of threads?

nevermind - I saw your drawing a few pages back.

 

[RobertOly]

The barrel will not be shortened. It wont have the reamer back in it only modified for the nut. We’re not doing chalk board stuff here we are using 2 guns that are proven and 2 shooters that can see a difference in the sand in their rests on target. This isnt an over the hood public range shootoff in varying conditions where the data is meaningless. These guns will be tuned to their max with each setup. Thanks for slipping in though. Good to see folks thinking.

Let me clarify, as I knew what I was thinking but it didn't get into the public domain as clearly.

If you shorten a barrel, or reduce it's outside diameter, either or both, it will likely change the harmonics thereof. How will you select for that?

I have no dog in this hunt, I just do science for a living and evaluate research for accuracy and benefit every week. A bad scientific design is a bad design, independent of the material subject.

 

[rijndael]

If your looking for the truth there is no opponent, just facts.

That's what I'm interested in; I'm not pro or anti barrel nuts. Heck, the last Proof I put on was a nut setup.

 

[Eagle Six]

I have shouldered barrels and nutted barrels. My nutted barrels are the most precise. Not because of the nut or shoulder rather because of what is in the tube of those barrels.

I agree, one test as designed here will not provide a definitive answer as to which is better for any particular endeavor, nonetheless I'm still interested in the results.

For my purpose and my location, I prefer a nutted barrel. I don't have the resources to shoulder or chamber and the location to get those services is not convenient. I'm also not a benchrest competitor and never will be (damn, grandpa said never say never!!), but that doesn't mean I don't strive within my small world to achieve the best precision and accuracy within my means.

Do the test, document the procedures and publish the results. I'll decide was is important to me and leave others to do the same.

 

[Mdhmsmith]

Robert, what’s your suggestion? How would you evaluate this? Re-profiling the barrel to allow for threading will change the harmonics and maybe the best load to some degree but do all combined factors affect the accuracy potential of the barrel?

 

[Old Navy]

Same non gunsmith could also make a shouldered prefit, no?

Can you rephrase that?

 

[gunsandgunsmithing]

Let me clarify, as I knew what I was thinking but it didn't get into the public domain as clearly.

If you shorten a barrel, or reduce it's outside diameter, either or both, it will likely change the harmonics thereof. How will you select for that?

I have no dog in this hunt, I just do science for a living and evaluate research for accuracy and benefit every week. A bad scientific design is a bad design, independent of the material subject.

Go back a few pages and look at his print. It's a clever way and I can envision the test being done with the only change at all, before and after a shoulder being, about .002-.003 of the shoulder moved forward to allow the nut to be tightened just before shoulder contact. At the muzzle, it would matter but I can't imagine it mattering at all, right at the breech face. I might or might not like the results but I have to say, Jackie can do this with as close as I can imagine to a true before and after, based on his print of how he's doing the tenon. Key is, to leave the only thing undone when you start the test is to pop the bbl loose, remove about .003 from the existing bbl shoulder..then put it back on and tighten the nut with the same hs dimension, even. Love the concept of how he did the tenon! I don't think it can get any better.

 

[rijndael]

Here's the print post:
https://forum.accurateshooter.com/threads/barrel-nut-disadvantages.4026563/post-38622520

 

[DShortt]

To the folks in this thread who want to discount anything observed from this test, how about proposing a test you deem appropriate and a means for achieving such a test.
It's easy to criticize. Offer a viable alternative. I'm all ears for something like that.

These guys are offering to do this on their own time and their own dime. Just what do you expect for free?

 

[Will Henry]

On my 223 BSA, the receiver threads are 1 1/8 diameter. The barrel shank is only 1.150. I didn't like this small amount of shoulder, so I threaded it 1.140x24 TPI and made a nut for it. Headspaced on the minimal shoulder then used the nut to lock it in place. So it's a little different than a typical Savage barrel nut system. I don't know how well it can shoot since, as I said, I require it to shoot well enough to take out a coyote and it does that nicely. I didn't try to tune it. I simply loaded some 55's pretty hot, sighted it in, then shot coyotes. I'm interested in seeing what Jackie learns from his.
One question: per IBS and Nbrsa rules, does the addition of a nut count as barrel diameter? WH