Long Range Hunting Online Magazine Rifling Angle to Bullet?
 Home LRH Store Forums Long Range Rifles Articles Reviews Group Hunts Shooting Classes G7 Ballistics Calculator Rules & FAQ Register Search Today's Posts Mark Forums Read

 Rifles, Bullets, Barrels & Ballistics

# Rifling Angle to Bullet?

#1
12-18-2009, 11:53 PM
 Platinum Member Join Date: Dec 2005 Posts: 2,483
Rifling Angle to 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?
#2
12-19-2009, 12:55 PM
 Platinum Member Join Date: Jul 2004 Location: Texas Posts: 7,193
Re: Rifling Angle to Bullet?

Quote:
 Originally Posted by Bart B 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
__________________
"PRESS ON"
#3
12-19-2009, 04:08 PM
 Gold Member Join Date: Aug 2009 Location: GA Posts: 515
Re: Rifling Angle to Bullet?

All the same angle.
#4
12-19-2009, 08:04 PM
 Platinum Member Join Date: Aug 2003 Location: NC, oceanfront Posts: 4,194
Re: Rifling Angle to Bullet?

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 by Mikecr; 12-19-2009 at 08:10 PM.

 Bookmarks

 Thread Tools Display Modes Linear Mode

 Similar Threads for: Rifling Angle to Bullet? Thread Thread Starter Forum Replies Last Post locotrician Long Range Hunting & Shooting 50 02-02-2015 09:37 AM Ski Long Range Hunting & Shooting 5 12-07-2010 09:32 PM NW Hunter Gunsmithing 5 02-28-2010 09:23 PM REDHEAD Rifles, Bullets, Barrels & Ballistics 12 02-16-2010 11:09 PM trueblue Long Range Scopes and Other Optics 11 06-26-2008 09:42 PM

All times are GMT -5. The time now is 06:18 AM.