New style bbl nut

[david12601]

Just ordered an Oregon mountain barrel but has anyone used one,if so please comment. Thanks

[Robinhood]

Oregon Mountain Barrel or Barrel nut?

The barrel nut looks very similar to the PVA unit. They look good but a hex will collapse with a thin wall nut. In my opinion that could impact setting head space. Let us know.

[david12601]

Should be here Oct ' 11. The Bartlein bbl came friday.......I will let you know

[david12601]

OK but came yesterday.......I had emailed the vendor and expressed those concerns about it collapsing they assured me that would not happen and if it did send it back....?so today I rebarreled one of my model 12 actions that I had laying around with a varmint contour 26 inch 22-250......I took a digital mic and took all measurements od i,d, threads and length and width and flats....put a tight wrench on it tightened it to 80 psi on purpose.......shot it and after 22 shots marked the bbl where it was headspaced loosened it removed the barrel and then reinstalled it NO PROBLEM. Headspace was spot on Fired 12 more rounds and grouped the same.....?I like this bbl nut I am going to order more

[PhilC]

How did you do tighten nut to 80psi?

[Robinhood]

Phil....... stop it.

David, What I meant was as the nut gets tight I was concerned that the barrel would start to turn, closing the headspace dimension. Hopefully I was wrong and as it seems you had now issues. Thanks for your post.

[david12601]

I used a crowfoot socket with a 1/2 inch torque wrench......will be swapping bbls a couple more times this week only torquing to 40 psi........only did the 80 to test the bbl but...I will keep everyone posted

[J.Baker]

Does anyone else see the irony here? A precision nut that the manufacturer recommends using a crescent wrench on to tighten/loosen. `Merican ingenuity at it's finest!!! :crazy:

[david12601]

Just to be clear..........the manufacturer did not recommend any specific type of wrench..........

[Robinhood]

90 ft/lbs is what some of the action manufacturers that use the 1 1/16-20 tenon thread recommend so you did OK doing 80 ft/lbs.

I think the point that James was making is that you basically are using two flats (or corners depending on how you want to describe where the force is applied on a hex nut) to tighten a thread.

Like I said before it would stand to reason that once you got close to suggested torque the nut would squeeze on the barrel threads and have an impact on the makeup of the action barrel junction. Nothing scientific just a hunch working with threaded machinery components for a few years. Now if you used a box end wrench then I would think that would be the ticket.

[HandgunHTR]

At 50-100 ft/lbs I am confident that you don't have to worry about the nut squeezing the barrel threads with any of the current hex barrel nuts made from 4140 CM steel or 416 SS. You would have to have them pretty thin (which the PVA and Oregon mountain ones are not) in order for it to be an issue.

[PhilC]

Phil....... stop it.
Stop what? It was a legitimate question as I assumed he was using a different method of tightening this unique barrel nut.

[J.Baker]

Just to be clear..........the manufacturer did not recommend any specific type of wrench..........

Their website says differently.
https://omrifles.com/collections/accessories/products/barrel-nut

6385

Not discounting the product or mocking it, I just found the irony of that statement on their website to be humorous is all.

[david12601]

Time will tell ......there is a lot of meat on this bbl but.....I had the same concerns as was mentioned it was just something different I wanted to try....like I said I will report back later this week I have 6 x47 lapua.....22-250.....243 ..to try out this week

[sharpshooter]

Looks like a non solution to a non problem....

[Orezona]

But appears to be a good looking nut. If it blends well and does what it is intended to do then great. Lots of us do stuff to rifles to look better for our own liking.

[david12601]

Went to range ,,,,,changed bbls 3 times no problems with headspace all is good.......may have to get a couple more I like the way they look

[Robinhood]

Went to range ,,,,,changed bbls 3 times no problems with headspace all is good.......may have to get a couple more I like the way they look

Good news. I think some people thought I was saying it would crush the barrel. What I was trying to convey that once the torque increased, the nut could distort enough to grab the barrel and it would turn with the nut closing the head space. Obviously i was mistaken. After looking at how the flats are short the wall thickness was not as thin as I thought. post pictures of the finished product please.

BTW, what is the distance for flat to flat. 1.250?

[david12601]

Pics will be up during the week headed to Virginia right now will be there until Tuesday......

[tobnpr]

Looks like a non solution to a non problem....

Exactly what I thought when I read the initial post.
I don't get the rationale.
If anything, milling those flats leaves substantially less contact surface area of the nut and receiver face which I perceive as a potential negative.
To each their own, aesthetics matter to some and that's subjective. If