The short answer is "No". The definition of choke is the constriction at the muzzle subtracted from the bore diameter. I.E. Bore = .729", muzzle = .699", then the constriction, or "choke" = .030", which is called Improved Modified, Light Full or Full, depending on whom you're talking to.
You can also pattern the gun at 40 yards and count the holes within a 30" circle and check the choke charts to see what your pattern gives you. Not only will different guns with the same constriction pattern differently, but the same gun with diffent ammo will also pattern differently.
