 For both Limited and Standard, the minimum caliber for minor scoring is 9x19 mm loaded to a power factor of 125 kgr·ft/s, and both require a minimum caliber of 10 mm (.40") for major scoring.However, while IPSC Standard still require the major power factor of 170 kgr·ft/s which was proposed by USPSA at the 1999 General Assembly, the following year in 2000 USPSA changed the major power factor of its Limited division to 165 kgr·ft/s.Limited-10 is very similar to the Limited division, except that (as the name implies) the competitor can only load a maximum of 10 rounds per magazine.