timing barrel

[10xsllc]

forgot to time barrel after cutting tenon and threading, have already chambered and set head space. any suggestions in an easy way to fix this

 

[Gundoktr]

Why does it need to be timed? Extractor cut? Sights? No easy way, start over

 

[Ggmac]

If say a Springfield style extractor cut , well only one option , ok 2 , start again or cut another extractor cut . But I guess you mean to set current barrel spec engraving or. Barrel bore to 12:00

 

[swd]

Just shoot it..

 

[10xsllc]

If say a Springfield style extractor cut , well only one option , ok 2 , start again or cut another extractor cut . But I guess you mean to set current barrel spec engraving or. Barrel bore to 12:00

just want barrel at 12:00

 

[10xsllc]

Just shoot it..

good idea

 

[DaveTooley]

Not sure what you mean by timed.
I've never timed-clocked a barrel in my life and never will if you mean bore alignment. Life's to short.

Question for you if you're referring to bore alignment.
You turn and thread the tenon. Then align the bore and "clock" the barrel.
Then the chamber, and by extension, the case head is not perpendicular to the action and by extension the bolt face.
That's well crazy.

 

[10xsllc]

Not sure what you mean by timed.
I've never timed-clocked a barrel in my life and never will if you mean bore alignment. Life's to short.

Question for you if you're referring to bore alignment.
You turn and thread the tenon. Then align the bore and "clock" the barrel.
Then the chamber, and by extension, the case head is not perpendicular to the action and by extension the bolt face.
That's well crazy.

my bore is align I was talking about the high side of the outside of barrel

 

[tmwinds]

my bore is align I was talking about the high side of the outside of barrel

Why?

 

[ridgeway]

Just shoot it.

 

[Nightraider]

forgot to time barrel after cutting tenon and threading, have already chambered and set head space. any suggestions in an easy way to fix this

Basically you'll need to cut the shoulder until it times up or down then adjust the tenon length and headspace. Unless it's an excessive amount you'll not necessarily be gaining anything.

 

[a6mmbrman]

Exactly what Dave said +1

 

[DaveTooley]

What is your set up and process for establishing the high side. I mainly use Bartlein's and they're never out more than a few thousandths. I've done Obermeyer barrels that were never turned after rifling and they were out .050"+ on the muzzle. Never timed and never made a difference on the target.
I do OEM precision gas gun barrels and time the gas port to fall in the groove. It's a simple process to move the shoulder forward. Everything else follows that.
If you have taken the barrel out of whatever your setup is you will not get it back in the same place. Just shoot it.

 

[Dusty Stevens]

Shoot it

 

[carlsbad]

Is there a problem you want to fix? There are a few barrels out there with a lot of bow in them. Is it a sporter? Are you hitting the stock? If you really do need to fix it, for a real reason, figure out how many degrees you want to rotate it. Call that x degrees. Then take x/360 x 62 thousandths off the shoulder and the tenon surfaces. deepen your chamber by the same amount.

--Jerry

 

[10xsllc]

Is there a problem you want to fix? There are a few barrels out there with a lot of bow in them. Is it a sporter? Are you hitting the stock? If you really do need to fix it, for a real reason, figure out how many degrees you want to rotate it. Call that x degrees. Then take x/360 x 62 thousandths off the shoulder and the tenon surfaces. deepen your chamber by the same amount.

--Jerry

thank you I am going to shoot it

 

[butchlambert]

Listen to Dave. I've mentioned before, Dave has chambered more barrels than all of us together.
Jerry, Carlsbad, I've never seen an actual bowed barrel or bowed bore. They may take off at a mild spiral. I've asked barrelmakers if the could bore "machine" a bowed bore. They just chuckle.

 

[dmoran]

My own testing has proven to me that indexing a bore's curvature is effective (particularly at distance/LR).
With what I call my "spin chassis" (pictured below), I have came to the conclusion, for myself any way, that there is advantages to index/timing a barrel to there unique optimal position(s). For barrels that I haven't or won't spin test to final fit/chamber, at 12-o'clock is my preference.
Donovan

 

[DaveTooley]

I have no doubt that the bore moves around some. The amount will vary from manufacturer to manufacturer and rifling process. The manufacturer I'm most familiar with uses a 6" long cutter head with about .0005"-0010" clearance. The barrel has to be be pretty darn straight for that to work. When chambering I indicate in the throat and the muzzle. What happens in between has no affect on where the bullet goes.
If the bore at the muzzle is concentric with a line that is perpendicular to the barrel shoulder and the same line is concentric in the throat that's about all there is to it.

 

[DaveTooley]

My own testing has proven to me that indexing a bore's curvature is effective (particularly at distance/LR).
With what I call my "spin chassis" (pictured below), I have came to the conclusion, for myself any way, that there is advantages to index/timing a barrel to there unique optimal position(s). For barrels that I haven't or won't spin test to final fit/chamber, at 12-o'clock is my preference.
Donovan

Interesting rig. Couple of questions

I assume as you rotate the barreled action you're shooting groups and you see changes on the target. When you see changes meaning the best and worse group size based on orientation. Have you ever tried tuning the rifle again? If so what were the results?

Donovan