Colt rifling observations and questions

[capstan]

I've read that the rifling on Colts is" left hand" twist. I checked a Python and det spl. and I see where the twist looks clockwise when looking at the muzzle end or counterclockwise when looking at the forcing cone end. So the bullet is spiraling toward the left as it goes through the barrel. I guess that's why its called a left hand twist? I've never taken a barrel on or off.This may be a stupid question but when the barrel is screwed into the frame, when holding the barrel and turning it, does it turn clockwise to tighten? If so, I believe that would mean that as the bullet goes through the barrel,it has the tendency to tighten the barrel to the frame from the bullet's torque. That all seems good, but are these observations correct?

I checked a trooper mark III and it looks like the rifling twist is opposite or "right hand" twist?
Are all the V-spring action Colts left hand twist, and the newer trooper mark III,lawman,king cobra,anaconda,etc. right hand twist? If so does the bullet's torque on the "new" actions have the tendency to loosen the barrel to frame fit?
Does anyone know why they changed the direction of twist from the newer and older action Colts? Has anyone ever heard of a barrel loosening up on the newer models?Or does the barrel screw in opposite of the older ones so the bullet also tends to tighten the fit.

I have a few det. spls that shoot a couple inches left(at 15 yards). From the above observations,it would appear that if the barrel was tightened just a tad, that would move the front sight in the correct direction to get it shooting "on" (as far as left/right) is concerned. I don't have the equipment to do this, but I'm curious if my observations are correct in this regard also.

[haggis]

¶#1 - correct
¶#2 - don't know about newer Colt's twist. Even if CW, I doubt it would unscrew a properly installed barrel. S&W does not have that problem with CW twist.
¶#3 - you move the front sight opposite to the direction you want the POI to go, so #3 is right - move the front sight left.

Buck

[capstan]

Thanks for your responses,Buck.
Good point on the Smith and Wessons. I have never had a problem or heard of a problem with any barrels coming loose on S&W's either. Must be a very high torgue at final tightening of the barrel to the frame. I dont think loctite or any such thread locker substances are used either.

[Boge]

...I have never had a problem or heard of a problem with any barrels coming loose on S&W's either. Must be a very high torgue at final tightening of the barrel to the frame. I dont think loctite or any such thread locker substances are used either.

Smith has had some barrels come off. I have seen it. Usually when this happened (it doesn't anymore) it was because ester containing products were used in the mounting process and later this was discovered (by Ruger) to be the cause of barrels loosening and even flying off revolvers. Ruger designed the Super Redhawk in the interim before it discovered that esters were causing this problem with Redhawks. There are huge signs at Ruger plants prohibiting any esters on site as a result. Yes, they use thread lockers, to the best of my knowledge today.

[capstan]

Boge , Wow ,that would get your attention having a barrel unscrew when you shoot it. Good info. I hadnt heard of the ester issue.
In the Kuhnausen manual ,i think it was , i read where they put "anti seize" compound on the threads but no mention was made as I recall to thread locking substance -maybe the older Colts didnt need it because of the barrel twist tending to tighen the barrel to frame. Maybe they use some thread locking on the trooper mark III's and such.