barrel torque

[M-61]

Can't get this straight in my mind.
In a right twist barrel as the bullet travels the barrels length is the tendency to TIGHTEN or To LOOSEN the barrel? The barrel is ,of course, has right hand threads.

 

[jonbearman]

Just a question,why would you be worried if the barrel is tight to begin with.Does it come loose?

 

[M-61]

Just a question,why would you be worried if the barrel is tight to begin with.Does it come loose?

Not worried at all....just thinking of which way the torque is twisting... strictly theoretical. Happened when I was reading about some one not using a barrel nut on a Savage and the wheels started turning.

 

[Tozguy]

OK I'll bite, with right hand twist the barrel would counter rotate towards the left and tend to tighten in the action.

 

[wedgy]

Yes, so a right handed shooter will have a bruise on his right cheek from the stock and a bruise on his left cheek from the bench. Now you got my wheels spinning too.

 

[Taildrag15X]

Yes, so a right handed shooter will have a bruise on his right cheek from the stock and a bruise on his left cheek from the bench. Now you got my wheels spinning too.

I guess this is why Chrysler put lefthanded lug nuts on the drivers side too.........

 

[M-61]

I guess this is why Chrysler put lefthanded lug nuts on the drivers side too.........
[/quote]

That's going back a number of years......

 

[Nomad47]

Harrell's Counter Torque muzzle brake.

 

[M-61]

OK...if I am looking at this correctly, the brake is diverting muzzle blast to the left to counter the torque effect that would be left (tightening the barrel in the receiver).
When this brake is ordered I would assume the question has to be asked LEFT or Right twist?

 

[CaptainMal]

Remember Isaac Newton . The reaction to the right hand twist would be opposite. Now turn around and figure out which way "opposite" is.

Now if it was a big factor, the more you shot the tighter the headspace would be until you got to the point of no shooting.

Any of this make sense?

 

[M-61]

Sure does. If I have you right....say a barrel just threaded in the receiver...turns very freely all lubed...(forget Head space for the moment)...with each shot the barrel would turn slightly further into the receiver....now to bring headspace back into play...eventually you would no longer be able to close the bolt?
Thanks to all who helped

 

[Nomad47]

M-61, I see the brake as wanting to turn the barrel to the right (as viewed at the top of the barrel and from behind). The holes are all the way around the brake and as the gasses progress toward the open end....
How do you see it?

 

[M-61]

M-61, I see the brake as wanting to turn the barrel to the right (as viewed at the top of the barrel and from behind). The holes are all the way around the brake and as the gasses progress toward the open end....
How do you see it?

Yes, I see it wanting to impart a force to the right also. This would try to negate the bullet trying to turn the barrel to the left (into the receiver)
I realize this is a small but present force. I wonder how/if it's compensated for on the 16" guns of a battleship?

 

[RandyD]

Yes, so a right handed shooter will have a bruise on his...and a bruise on his left cheek from the bench...

So, this explains those callouses I have been developing. I'll try to explain this to my wife.

 

[RandyD]

OK I'll bite, with right hand twist the barrel would counter rotate towards the left and tend to tighten in the action.

For a barrel to loosen or tighten from the torque of a bullet, one additional factor must exist, a desire for the barrel to not loosen or tighten.

 

[Robert]

Yes, so a right handed shooter will have a bruise on his right cheek from the stock and a bruise on his left cheek from the bench. Now you got my wheels spinning too.

Counter torque generated by the bullet rotation is so minimal that it is in no influence that it cannot led to increase tightening torque of the barrel.

Some shooters, using actions designed for easy barrel swap, frequently switch barrels screwing them by hand with a simple flick at end, and the barrel loosen easily by hand again on the next swap...

There is no shift of point of impact during shooting, indicating nothing change in barrel hold during shooting.

Should the reaction been sufficient enough to tighten the barrel, hand loosening the barrel by hand for the next change would not be possible.

R.G.C

 

[CatShooter]

Counter torque generated by the bullet rotation is so minimal that it is in no influence that it cannot led to increase tightening torque of the barrel.

R.G.C

The early Colt Anaconda revolvers had a right hand thread on the barrels, but a left hand rifling twist.

They shot the barrels loose!!

Colt had to modify the gun to pin the barrels in place.

 

[dragman]

Bought a semi custom gun off a guy once in a savage with a barrel nut. barrel taper wouldn't let the traditional savage wrench be used so the original builder used a spanner wrench I can only assume. short story The first time I tried to clean it I grabbed the brake (large one off of 110BA) and I twisted the barrel away from the action. Wasn't too happy to say the least but after I turned the barrel down a little in the lath and used my savage wrench re-headspacing it the gun did shoot well. could have been BAD

 

[M-61]

Counter torque generated by the bullet rotation is so minimal that it is in no influence that it cannot led to increase tightening torque of the barrel.

R.G.C

The early Colt Anaconda revolvers had a right hand thread on the barrels, but a left hand rifling twist.

They shot the barrels loose!!

Colt had to modify the gun to pin the barrels in place.

OK The torque is something to consider.
Now does a heavier bullet in a tighter twist produce more torque? I thought about this and although I thought so at first I also considered a heavy bullet in a slow twist. Would there be a 'leverage' force that would come into play with the slow twist?

 

[holstil]

I can't see a brake working like that. It seems that the gas would just escape at what ever port it has the chance to get out of first.
Something about mass and inertia, or the lack of, I think. I do like Harrell's brakes though.
I hope they don't spin them selves off. ;D

Seems like my switch barrels require more effort to get off after they're shot. Maybe I'm more tired or something. ???

Jim