The Firing Line Forums - View Single Post - For a .357Mag to reach full potential

MrBorland · October 10, 2012, 05:05 PM

Yes, pressure from the powder burn continues to push the bullet down the barrel, and the bullet leaves the barrel while still being pushed. In fact, a .357mag shot out an 18" rifle barrel gains velocity over a 6" revolver, so technically, it takes at least 18" for this cartridge to reach it's full potential. More relevant, then, is how much barrel do you need for your .357mag to do it's job.

October 10, 2012, 05:05 PM	#2
MrBorland Senior Member Join Date: May 31, 2007 Location: NC Posts: 2,614	Yes, pressure from the powder burn continues to push the bullet down the barrel, and the bullet leaves the barrel while still being pushed. In fact, a .357mag shot out an 18" rifle barrel gains velocity over a 6" revolver, so technically, it takes at least 18" for this cartridge to reach it's full potential. More relevant, then, is how much barrel do you need for your .357mag to do it's job.