I have a Remington 1100 LT 20 ga with a 26" barrel/ ImpCyl. I would like to have Briley install their steel shot compatible chokes. on this shotgun. Any members have this done ? I have micked dimensions at the muzzle:OD/0.7035"; ID/0.6065". Briley's policy is to send the barrel in for evaluation. But members may save me that trouble.