The Firing Line Forums - View Single Post - Would somebody explain about barrel resonance?

riddleofsteel · December 2, 2001, 05:21 PM

If you were on a swing, going back and forth, and if you were trying to throw a rock at something while on that swing the best time to throw would be that time when you were at the top of the swing. There is a brief pause, just as you stop before you start in the other direction.
If your barrel is whipping or oscellating ect. the point of most consistent accuracy is if the bullet leaves the barrel when it is at that pause either the top or bottom of the sine wave, so to speak. You can accomplish this with a movable barrel weight like the BOSS, or by adjusting the tension on the bedding screws or forend tension device like an old Remingtom 40X, stepped barrels at critical node points like the old Mausers or by simply chosing another load.
Trick is to stabililize the rifle so the barrel harmonic properties do not change (pillar bedding, glass bedding, glueing the action to the stock, ect.). That way when you find the magic load it stays that way.

December 2, 2001, 05:21 PM	#3
riddleofsteel Senior Member Join Date: January 18, 2000 Location: above ground Posts: 1,558	If you were on a swing, going back and forth, and if you were trying to throw a rock at something while on that swing the best time to throw would be that time when you were at the top of the swing. There is a brief pause, just as you stop before you start in the other direction. If your barrel is whipping or oscellating ect. the point of most consistent accuracy is if the bullet leaves the barrel when it is at that pause either the top or bottom of the sine wave, so to speak. You can accomplish this with a movable barrel weight like the BOSS, or by adjusting the tension on the bedding screws or forend tension device like an old Remingtom 40X, stepped barrels at critical node points like the old Mausers or by simply chosing another load. Trick is to stabililize the rifle so the barrel harmonic properties do not change (pillar bedding, glass bedding, glueing the action to the stock, ect.). That way when you find the magic load it stays that way. __________________ For him there was always the discipline of steel.