Talk:Type 1 Armor Piercing Shell/@comment-25459687-20141012134416

"The original Type 91 APC was L/4.25 or 76.9 inches (195.35 cm) long.  The later Type 1 version was L/4.47 or 81 inches (206 cm) long.  The main difference was the length of the windscreen, as the conic angle went from 23.5 degrees to a longer, sharper 21 degrees.  Type 1 shells also introduced a dye bag, which may have slightly increased their weight over that of the Type 91.  The base of the Type 1 was slightly different from the Type 91 as the original two driving bands were replaced by a single double-width band with a copper ring in the middle of the band.  The modified type superseded the original in 1941, so these battleships may never have carried any but the newer shell.  "

information from http://www.navweaps.com/Weapons/WNJAP_18-45_t94.htm in discussion of the Yamato-class guns. I have been having a devil of a time finding out any info on this shell, that's the first decent data I've found.

queek