Drew, Thanks very much for the reply. I would ask for some clarification of your info as I am short on terminology.
Regarding Parkers you say: "choke length of 1 1/2" to 2". Then a .007-.010 constriction 4 and 2 inches with the remainder in the last 2"? Total length 4" to 6"? 4" or 2" taper to a 2" parallel? Have I understood this? That is that the "(1 1/2" to 2")" is the parallel at the muzzle end? Remingtons, Lefever, and Ithaca are the same?
Then if I understand, the example guns you list show the length of the parallels and this parallel is the "choke"?
I ask because I want to be certain of what you have explained. If one was to try to measure a guns choke they should expect a taper of anywhere between 2 to 4 inches and a parallel between 2" to 1/4", the later in the Remington Parkers? Thank you very much, Kurt