I have never in any Regional or Sectional Match seen anyone DQed for not making Power Factor they only then are scored as Minor power factor as a matter of fact you can choose to shoot Minor even if in that Category lets say Single Stack like the Single Stack Classic in PASA every year all the Big names are there like Rob Leatham who has won for maybe 8 years now, if you want you can shoot a 9mm Minor that is 125,000 PF that is weight of bullets times FPS according to their Chrno, but difference is scoring you will not get the same points for your hits, 125,000 that is the lowest allowed as some others have said if you don't make at least that 125,000 your score will not count but you can shoot it is not a DQ offence Major PF is 165,000 I have seen where a person was shooting a 45acp and did not make PF by just 3 or 4 FPS he was scored Minor but at most local clubs they don't Chrono and it is more just practice and the love for shooting. So if you have a Production Gun in a 9mm and you are useing a 125 gr. bullet it must go 1000 FPS to make Minor PF if You are wanting to shoot Major in Limited with a 180 gr bullet it must travel 916.66 or 917 FPS, If you are shooting a 9mm and want to shoot Major that same 125 gr. bullet must now travel at 1320 FPS.
The only Class that gets full points for Minor PF is Production class the gun must be a safe action type gun or Double Action Glock or XD and other similar guns.
All other Classes, Single Stack, Limited 10, Limited, and Open all must reach 165,000 to get full points
If you have never Shot USPSA it is a must if you love to shoot.
WARNING you will be hooked once you shoot it
All you need is any Revolver or semi auto no smaller then .355 and no larger then .4515, 5 mags, for revolver some moon clips, 200 rounds or more and a holster that covers trigger gaurd only in Production and Single Stack in all other Lim 10, Lim, Open, you can use a open type Hoster one that only holds the gun to your hip by just the trigger gaurd.