 Minimum caliber for minor scoring is 9x19 mm loaded to a power factor of 125 kgr·ft/s while minimum caliber for major scoring is a 10 mm (.40") cartridge loaded to a power factor of 165 kgr·ft/s, making for an interesting choice between minor and major scoring taken in mind the differences in recoil, magazine capacity and scoring points.An example of differences in magazine capacity depending on caliber can be seen when comparing stock 141.25 mm STI 2011 double stack magazines, which according to the manufacturer yields a capacity of either 14 rounds for .45 ACP, 17 rounds for .40 S&W or 20 rounds for 9x19 mm.Magazine capacity can be further increased using aftermarket springs, followers and basepads as long as each magazine still fits the 141.25 mm gauge.