Loomis Action Type: Single Shot While many of its single-shot, postCivil War peers had long since been discontinued, the Remington rolling block, with its modern heat-treated steels, made the transition into the future. Swedish m/1867 rifle. It was made from left-over Model 1871 rolling block pistol receivers, and resulted in a very well balanced rifle for short-range shooting. In 1873, Japan ordered close to 2,400 of the Spanish Model rifles but demanded they be reamed and re-chambered to its in-country Remington caliber of 12.11mm Swedish Remington centerfire. The official military designation for the cartridge was '12mm Remington' from 1879.[4]. });