Several Browning firearms feature a rotary style magazine. They are distinguised by the fact that the cartridges make a circular path as the move from the "bottom" of the magazine to the top position. The Browning X-Bolt and the Browning T-Bolt are current models featuring rotary magazines. The advantage of a rotary magazine, versus one which offsets every other round to the right and left it that the cartridge is always presented perfectly in the middle. There is no left/right bias similar to a single stack magazine.