[Researcher]

At the time your BE-Grade was built, our U.S. ammunition manufacturers offered paper 12-gauge shells in 2 5/8-, 2 3/4-, 2 7/8-, 3- & 3 1/4-inch (bulk powder only) lengths.

LEADER 12-gauge, 2 3-4 inch, 3 1-4 dram Mullerite, 1 1-4 ounce # 7 1-2Ch..jpg

ARROW 12-gauge 2 7-8 inch 01.jpg

LEADER 12-gauge 3-inch Special Wadding.jpg

1901 PIGEON 12-gauge, 3 1-4 inch 01.jpg

If Remington Arms Co. chambered one of their Remington Hammerless Doubles for longer shells it was so marked on the bottom of the tubes, just forward of the barrel flats.

121252 DEO-Grade 07 2 7-8 inch chamber marking.jpg

123247 11 Chamber Length Markings.jpg

131861 07 2 3-4 chamber marking.jpg

132034 02 2 3-4 chamber marking.jpg