Why choke a barrel?

by Tom Gaylord, a.k.a. B.B. Pelletier

This blog was requested by blog reader Joe, who wanted to know if choked airgun barrels are more accurate, and why. A number of other readers seconded his request. So, we know there’s interest in the subject.

What is a choke?
A choked barrel is one in which there’s a reduction in the diameter of the bore near the muzzle. Someone likened it to the FX Smooth Twist barrel that’s rifled only at the end of the barrel, but it isn’t the same. The Smooth Twist barrel has a constriction — the rising of the rifled lands. But in a choked barrel, the entire bore gets smaller. I don’t know if the Smooth Twist barrel is also choked; but if it is, that’s a separate thing. read more


Choked bores and tapered bores

by B.B. Pelletier

This subject came up as the result of a comment I made about choked and tapered bores. It turns out that gun makers were having this same discussion 140 years ago with pretty much the same results.

The best gun makers of the 1860-1910 timeframe (and Harry Pope for just a little longer) all either taper-bored their barrels or choke-bored them. I will describe each of these conditions in a moment. There really isn’t much difference between choke-boring and taper-boring, but the slight difference that does exist allows us to talk about each of them as a separate issue.

Most gun makers (or barrel-makers, because in many cases — like Pope, a man did not make the entire gun) did taper-bore their barrels. But that wasn’t what they called it, so the fact that they did it got lost because of the subtleties of the language. read more