For example the 22/40 SMc cartridge has a volumetric capacity of 44 grains of water at the neck shoulder junction, midway in capacity between the 22-250 and 220 Swift but about 0.3 inches shorter. It was loaded with 42 gr. of Hodgdon H-335 propellant and a Nosler 40 gr bullet. Velocities averaged 4655 ft/sec, chamber pressures were moderate and groups were under 0.5 inches at 100 yd. Further testing with 46.5 gr Hodgdon H 414 propellant and a 55-gr Sierra bullet gave average velocities of 4171.5 ft/sec again at moderate (below 62000 psi) chamber pressures. This cartridge has a D to d ratio of 2.071 and a shear line length of 0.349 inches. The shear line is short as is the propellant plug following the bullet, therefore the peak pressures are low and efficiency is high. As with other SMc cartridges, the shear line pressure increase is well defined on piezoelectric chamber pressure measurements.