# Rifling Angle to Bullet?

#### Bart B

##### Well-Known Member
Here's three barrels:

22 caliber (.224" groove diameter), 1:8" twist.

30 caliber (.308" groove diameter), 1:11" twist.

44 caliber (..448" groove diameter), 1:16" twist.

Which one has the greatest angle the rifling presents to the bullet?

Here's three barrels:

22 caliber (.224" groove diameter), 1:8" twist.

30 caliber (.308" groove diameter), 1:11" twist.

44 caliber (..448" groove diameter), 1:16" twist.

Which one has the greatest angle the rifling presents to the bullet?

The 1 in 8 twist.

The faster the twist the greater the angle.

Twist rates are based on the inches it takes for the bullet to make one full revolution=
1in 8 = 1 reveloution in 8" and so fourth.

J E CUSTOM

All the same angle.

The factors here amount to circumference traveled per bore travel
[2 sides of a triangle]

InvTan(Pi*Diameter/Travel)
All three are ~5 degrees
(I think)

Last edited:
Warning! This thread is more than 15 years ago old.
It's likely that no further discussion is required, in which case we recommend starting a new thread. If however you feel your response is required you can still do so.