Can I shoot 3" shells in my 3 1/2" Super X3 shotgun?
A Super X3 with a 3 1/2" chamber is designed to shoot factory 12 gauge loads including 2 3/4", 3" and 3 1/2" (1 1/8 oz. to 2 1/4 oz.) field loads. They are not designed to shoot the lightest factory 7/8 oz. or 1 oz. target loads.
Can I shoot 2 3/4" shells in my 3" Super X3 shotgun?
A field Super X3 with a 3" chamber is designed to shoot factory 12 gauge loads including 2 3/4" and 3" (1 oz. to 2 oz.) field loads. They are not designed to shoot the lightest factory 7/8 oz. or 1 oz. target loads nor any 3 1/2" shells.
A Sporting Super X3 will shoot the lightest 7/8 oz. target loads to heavy magnum loads (2 3/4" only).
http://www.winchesterguns.com/customerservice/qna/detail.asp?id=256
• 31⁄2" —These models have a 31⁄2" chamber designed to
shoot factory 12 gauge loads including 23⁄4", 3" and 31⁄2"
(11⁄8 oz. to 21⁄4 oz.) field loads. (They are NOT designed
to shoot the lightest factory 7⁄8 oz. and 1 oz. loads.)
• 3" — These models have a 3" chamber designed to
shoot factory 12 gauge loads including 23⁄4" and 3"
(1 oz. to 2 oz.) field loads. (They are NOT designed
to shoot the lightest factory 7⁄8 oz. and 1 oz. target
loads or any 31⁄2" shells.