Rate of Twist

frogsaw · January 30, 2010, 09:22 PM

How do I go about identifying the rate of twist of the rifling when the manufacturer refuses to, or is incapable of providing this information? The rifle that I speak of is a Winchester Model 70, 338 Win Mag.

Bullet94 · January 31, 2010, 12:23 AM

You might look here -

http://www.gunnersden.com/index.htm....ist-rates.html

InigoMontoya · January 31, 2010, 12:51 AM

Honest question to one who's gun activities are outside the mainstream: Couldn't you just measure it?

B.L.E. · January 31, 2010, 07:41 AM

Measuring rate of twist.

Put a cleaning jag and a tight fitting cleaning patch on a cleaning rod and mark the cleaning rod with a felt tip marker.

Pull the patch through the barrel and watch the mark on the rod, when the rod makes a complete 360 degree turn, stop and measure how far you pulled the cleaning rod through the bore. The number of inches you pulled it through the bore is your twist rate.

If the twist is so slow or the barrel is so short that the rifling doesn't make a complete turn, measure how far the cleaning rod had to be pulled to turn 180 degrees and double the amount of inches.

Bart B. · January 31, 2010, 09:21 AM

Winchester openly shows their twist rate at:

http://www.winchesterguns.com/produc...p?id=535108236

They are capable of and do show this information.

frogsaw · January 31, 2010, 05:48 PM

Thanks, everydoby. I really appreciate all of the information.

January 30, 2010, 09:22 PM	#1
frogsaw Member Join Date: June 30, 2007 Posts: 85	Rate of Twist How do I go about identifying the rate of twist of the rifling when the manufacturer refuses to, or is incapable of providing this information? The rifle that I speak of is a Winchester Model 70, 338 Win Mag.

January 31, 2010, 12:23 AM	#2
Bullet94 Senior Member Join Date: September 8, 2004 Location: Kansas Posts: 723	You might look here - http://www.gunnersden.com/index.htm....ist-rates.html __________________ PRO-SECOND AMENDMENT - Live Free or Die Last edited by Bullet94; January 31, 2010 at 12:32 AM.

January 31, 2010, 12:51 AM	#3
InigoMontoya Senior Member Join Date: January 14, 2007 Location: Ridgecrest, CA Posts: 229	Honest question to one who's gun activities are outside the mainstream: Couldn't you just measure it?

January 31, 2010, 07:41 AM	#4
B.L.E. Senior Member Join Date: December 20, 2008 Location: Somewhere on the Southern shore of Lake Travis, TX Posts: 2,603	Measuring rate of twist. Put a cleaning jag and a tight fitting cleaning patch on a cleaning rod and mark the cleaning rod with a felt tip marker. Pull the patch through the barrel and watch the mark on the rod, when the rod makes a complete 360 degree turn, stop and measure how far you pulled the cleaning rod through the bore. The number of inches you pulled it through the bore is your twist rate. If the twist is so slow or the barrel is so short that the rifling doesn't make a complete turn, measure how far the cleaning rod had to be pulled to turn 180 degrees and double the amount of inches.

January 31, 2010, 09:21 AM	#5
Bart B. Senior Member Join Date: February 15, 2009 Posts: 8,927	Winchester openly shows their twist rate at: http://www.winchesterguns.com/produc...p?id=535108236 They are capable of and do show this information.

January 31, 2010, 05:48 PM	#6
frogsaw Member Join Date: June 30, 2007 Posts: 85	Thanks, everydoby. I really appreciate all of the information.