The original standard weight 20 gauge 1100s had a 22" deer barrel introduced in 1969, then the lightweight version had a 20" deer barrel introduced in 1978. I have no idea how common they were, and Remington has also doubtless sold countless 'extra' deer barrels. The rifled deer barrels came much later, mid '90s if memory serves. I have seen several Remington smoothbore barrels that were good out well over 100 yards. Only way to know for sure is try it with different loads.