Quote Originally Posted by louisvanhovell View Post
After speaking to John, I know the answer to my question:

Spitfire (and Firebird) barrels are modified Superten barrels.
They have a choke. This is necessary for accuracy, especially in .177.
BSA springer barrels do not have a choke.
In .22 and .25, this is probably less of a problem.

I have actually experienced this myself: a gunsmith once shortened my .177 Spitfire barrel, after which the gun grouped like a shotgun. I had to bin it and find another Spitfire barrel.

Atb, Louis
John is a good man to know, sure he could help with anything you needed Spitfire wise