In going along with what Dick and Jim stated on the barrel length and IC/IC, I would want to know what the chokes are in thousandths. From what I understand the taper from the bore leading to the chokes is approximately 4" and then it is straight for approx another 1" to the muzzle. If the barrel had been 28" you wouldn't get any constriction. I have a 16 ga. Field Grade with 26 1/4" barrels, imp.cyl./imp.cyl., Hunter One-Trigger and ejectors and the chokes go straight for at least an inch. They both mike up to .662 for an inch. So you want to make sure that they are what they came from the factory with. Good Luck and keep us posted.