New line of 5 cartridges based on the 30 M1 case.

From the website:

The Garin SureStrike System is a complete line of five highly efficient and accurate cartridges designed for varmint, small game and target pursuits. Differing only by specific neck diameter and identical from the neck down, these cartridges are based on the .30 caliber M-1 Carbine case and are available in .17 Garin, .20 Garin, .22 Garin, 6mm Garin and .25 Garin. The broad choice of calibers, bullet weights, ballistic coefficients and powders allows shooters to select the most ballistically appropriate cartridge for their chosen application and conditions.