Trivia Question of the day!

Redhook

New member
I think I got the right forum!?!

I really don't know the answer, but I figure that someone out there does.

Why is it that most rifles and pistols have right hand rifle twists while the .45 ACP is left hand?

-Red-
 
M1911 rifling twists are left hand to comply with original specs. At that period in time, most all Colt rifling was left hand. Smith & Wesson & others were left hand. Not all .45 ACP are left hand.

When I asked an all wise guru why Colt rifling was left hand, I was told it was because "Sam Colt was an ornery pervert".
 
Hmmm. Interesting question. I wonder if it really makes any difference or does the right/left twist matter in some very small way depending on whether the gun is shot in the Northern Hemisphere or the Southern Hemisphere? (Yes, I'm serious.)
 
Hi, Mal,

No.

The early Colt guns used rifling of both twists, apparently based on nothing more than which contractor made their rifling machines.

When Colt's went to screwed in barrels, it was felt that left hand twist rifling had less tendency to cause the barrel to unscrew than right hand, and Colt's stuck to it. (Colt revolvers never used a barrel pin, which was S&W's answer to the unscrewing problem.)

Of course, it makes no difference in an auto pistol, but their machines were all set up for left hand twist, so they used it. When the Army adopted the Colt .45 pistol as the Model 1911, the Colt design became "the spec", rifling twist and all.

Jim
 
Jim - I understood all the manufacturing reasons behind the various twists and the reasons for them. My curiosity was piqued by the thought that the rotation of the bullet, right or left, might be influenced very slightly after it left the muzzle by the coriolis force of the earth. It was more of a physics questions instead of a firearms question. I seriously doubt that we will find the answer since there are too many variables affecting the bullets flight that are much greater than any influence due to the rotation.
 
The .45 Glocks 21, 30 and 36 all have right hand twist.

But then that's Glock for you...always wanting to be different:D

Good Shooting
RED
 
I have head that the left hand twist had to do with the way some barrels screwed in so they would not have a tendancy to get loose after firing. I doubt it makes much if any difference.

The following idea isn't as good as the coriolis effect one, but consider: a left hand twist would cause the bullet to travel slightly to the left. Pulling a trigger with the right hand would cause the muzzle to move slightly to the right so the two cancel each other out and that's another reason why the 1911 shoot so well, right? :p
 
Pottie humor

You guys must really lay some bombs if you feel the need to shoot that turd before it makes it down the drain...

Weapons grade feces....
 
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