barrel twist

squrrilJerky · 01-16-2005, 10:07 AM

if one barrel is a 1 in 16'' twist
and the other is a 1 in 9'' twist
then the bullet that takes 1 turn every 9'' is more accurate
right ???

ScottD · 01-16-2005, 11:17 AM

Depends on many other factors, one of which is the weight of the bullet. Just because a barrel has a certain twist rate doesn't nessesary make it any more accurate than another barrel. It depends on what you are shooting out of it.

fred · 01-17-2005, 07:19 PM

Generally the larger the ratio of length divided by caliber, the faster the twist needed to stabilize flight. Fast twist rates generally imply jacketed bullets, slow twist rates imply lead as the lead would tend to broach fast twist rifling and foul the bore. Old timers 120 yrs ago used gain-twist rifling: started slow and increased pitch as it approached the muzzle to get the best long range ballistics out of lead bullets fired with blackpowder. I don't have the formula to calculate the minimum twist or I'd give it to you. Fred

01-16-2005, 10:07 AM	#1
squrrilJerky Member Join Date: Jun 2004 Location: coventry,rhode island Posts: 79 Trader Rating: (0)	barrel twist if one barrel is a 1 in 16'' twist and the other is a 1 in 9'' twist then the bullet that takes 1 turn every 9'' is more accurate right ???

01-16-2005, 11:17 AM	#2
ScottD Senior Member Join Date: Mar 2002 Location: Evanston, IL Posts: 1,020 Trader Rating: (0)	Depends on many other factors, one of which is the weight of the bullet. Just because a barrel has a certain twist rate doesn't nessesary make it any more accurate than another barrel. It depends on what you are shooting out of it. __________________ "Some people can not live without wilderness"-Aldo Leopold

01-17-2005, 07:19 PM	#3
fred Senior Member Join Date: Mar 2002 Location: NC, USA Posts: 175 Trader Rating: (0)	Generally the larger the ratio of length divided by caliber, the faster the twist needed to stabilize flight. Fast twist rates generally imply jacketed bullets, slow twist rates imply lead as the lead would tend to broach fast twist rifling and foul the bore. Old timers 120 yrs ago used gain-twist rifling: started slow and increased pitch as it approached the muzzle to get the best long range ballistics out of lead bullets fired with blackpowder. I don't have the formula to calculate the minimum twist or I'd give it to you. Fred