[Rebelbase]

BLOWGUN VELOCITY: The following information is based on a .40 caliber, 1 piece blowgun. When using a .50 caliber you can increase the velocity and accuracy by 25%.

36" accuracy is 100 feet, 200 feet per second
48" accuracy is 150 feet, 250 feet per second.
60" accuracy is 150 feet, 250 feet per second
Every time you add a 24" extension to one of these sizes, you'll be increasing your accuracy by 50 feet and your feet per second by another 150 feet per second.

[verity]

Do your calculations take the "spittle supressor" into consideration? :~)