Cutting barrel for 10/22 sbr

[RMears 45]

I am cutting and threading a 10/22 barrel at 4". Should I worry about barrel flex at that short length. 4" out that barrel should still be above the .75" range and it starting at .92" with at least a 5/8 shank at chamber. Should i use a cathead just because I have one available and error on the
side of caution. I would really hate for a baffel/end cap to take " an arrow in the knee".

[propeine]

I am cutting and threading a 10/22 barrel at 4". Should I worry about barrel flex at that short length. 4" out that barrel should still be above the .75" range and it starting at .92" with at least a 5/8 shank at chamber. Should i use a cathead just because I have one available and error on the
side of caution. I would really hate for a baffel/end cap to take " an arrow in the knee".

Thats more than 2.5 x diameter...I would support it personally

[L1A1Rocker]

Support it, and index on the bore. Those are known for having the bore not quite line up with the O.D.

[T-Rex]

Whatever you do, do not use this as a training video.
https://youtu.be/7JQC7kXu_rU

[fastfire]

Whatever you do, do not use this as a training video.
https://youtu.be/7JQC7kXu_rU

Redneck Rifle Barrel cutting, really crude!

[RMears 45]

Hahahaha.. loved it, very un-educational. Why do I think he cut the barrel so that his duck tape could lay flat on his 24 oz Pepsi bottle. Did you notice his rubber boots with shorts, it must be deep there.

[RMears 45]

Well, it is finished. We elected to use a 4 jaw and clamp over the level place over the sight cut.
Setting up on the Ole Griz.

[RMears 45]

The finished threads

[RMears 45]

The finished project. Chopped Choate folder a Tasco 30mm red dot and a Pilot II.

[quiettime]

Well, it is finished. We elected to use a 4 jaw and clamp over the level place over the sight cut.
Setting up on the Ole Griz.

I hope you at least made some attempt to indicate the bore. Commercial barrels quite often have bore and OD that are not concentric and Ruger 10/22 is actually known for this. Also they often have bores that are not straight that the path of the bullet is at an angle to the threads.

Please double check alignment before shooting to avoid baffle strikes.

[RMears 45]

We did, just kept playing with the dial indicator until it was .0002 . The bore was about .006 out of center. I have about a dozen rounds the pipe with no baffle /end cap strikes. I hope to shoot some groups today.

[MartinDWhite]

I threaded a barrel recently that was .025" out of concentric. It was the worst I have seen. Most are close, the average feels like it is .005" over the ones I have threaded.

[quiettime]

I threaded a barrel recently that was .025" out of concentric. It was the worst I have seen. Most are close, the average feels like it is .005" over the ones I have threaded.

So what you're saying is you need to indicate the bore because even though some are close, there are examples out there off by quite a bit.

Not to beat a dead horse but I feel compelled to also mention that even if the bore is dead center at the muzzle, it can still be crooked which will lead to increasing misalignment the longer the can is...

Correct way to thread is to indicate across a tight-fitting "range rod" in the bore

Just trying to save someone some grief in future