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DML · January 20, 2001, 03:45 PM

Dave McC and PJR are correct. Choke is simply the amount of constriction. For example, Remington IC barrels have about .008" constriction at the muzzle, but they don't hold their tolerences very close. I have barrels in the shop right now that measure .720/.728 and .738/.746 yet they are all marked IC.

There are many factors that determine what kind of patterns a barrel may shoot. Shot size, type of wads, shot cup, powder, etc., etc. A barrel that has .020" constriction may be called Modified, but may throw anything from an Improved Cylinder to Full choke patterns. Only patterning the barrel with various brands of shells and shot sizes will tell you for sure.

January 20, 2001, 03:45 PM	#4
DML Senior Member Join Date: November 24, 2000 Location: Aridzona Posts: 257	Dave McC and PJR are correct. Choke is simply the amount of constriction. For example, Remington IC barrels have about .008" constriction at the muzzle, but they don't hold their tolerences very close. I have barrels in the shop right now that measure .720/.728 and .738/.746 yet they are all marked IC. There are many factors that determine what kind of patterns a barrel may shoot. Shot size, type of wads, shot cup, powder, etc., etc. A barrel that has .020" constriction may be called Modified, but may throw anything from an Improved Cylinder to Full choke patterns. Only patterning the barrel with various brands of shells and shot sizes will tell you for sure.