We need you to define "effective" and "6 gun". If you are asking the maximum effective range of a Colt Single Action Army revolver, sometimes called a six shooter, it is about 50 yards.
That the barrel (not the gun, the BARREL) was made in June 1944. Posibbly an M1 Garand, or an 1903 Springfield?
Oxidation of the steel of a gun barrel.
You can use the N-strike Recon CS-6 barrel (good gun, I recommend it)
The gun barrel is the metal part that the bullet comes out of.
Flower in the Gun Barrel was created in 2008.
The Paris Gun was not a great success: the payload was minuscule, the barrel required frequent replacement and its accuracy was only good enough for city-sized targets.
A barrel is part of a gun
Check on line auctions, gun shops, gun shows and pawn shops.
Barrel of a Gun - Guster song - was created in 1998.
You will have to replace the barrel
The barrel is usually above the centerline of the gun. When fired, recoil pushes straight back from the line of the barrel, but that is offset above the centerline, and causes the gun to pivot.
Sorry, but we need more information on the term "round barrel gun".