is that cw or ccw? thanks

back to front, ie the way the bullet goes.

Twist rate is the distance it takes for the rifling to make a full turn of 360 degrees. It has nothing to do with direction in the barrel, barrel length, number of grooves, or twist direction. An extreme example would be a 2" barrel S&W. The twist rate is 18 3/4", but in the 2" (or 1 7/8" J Frame guns) the rifling actually turns slightly less than 1/9 rotation, or just about the width of the lands in the bore.

Think of a screw with a nut.

A clockwise thread no matter which end is turned is still a clockwise thread.

I wonder if Samuel Colt had a patent on his LH rifling?
Would explain why S&W went the other way with rifling and cylinder rotation.

quote:

Originally posted by 500 Magnum Nut:
Think of a screw with a nut.


I wonder if Samuel Colt had a patent on his LH rifling?
Would explain why S&W went the other way with rifling and cylinder rotation.

Note: THe S&W N-frame revolvers in .45 ACP/Auto RIm have a 1 in 15" twist rate.
with a 5" barrel the bullet gets 1/3 rotation.;
1911 Colt 1 in 16" Twist rate & with a full
5" Bbl actually having just over 4" the bullet
will have a 1/4 rotation.

quote:

Originally posted by zoli28:
is that cw or ccw? thanks

Most rifling is right hand twist (CW) when looking from the breech. Colt and a few others are left hand twist.

The number of lands and grooves vary also with most rifling being even numbers of lands and grooves.

Actually, the torque reaction to bullet travel in left hand twist rifling tends try to unscrew barrels (which are generally right hand threads).

thanks. that answers my question. i won't be shooting my barrel loose