Just for the sake of discussion...
I seem to recall a jaw-fest awhile back wherein one Pard said the minimum and maximum velocities were printed in the Tally Book that every member gets on signing up. Can't locate mine right now but if I recall correctly he was saying that the low end figure was around 850 fps or so and the upper end around 1,000 fps, probably wrong on both, but at any rate, the present By-Laws state the following:
9-2. Smokeless powder loads shall not exceed the maximum muzzle velocities of comparable black powder loads, (e.g.: 1500 fps for single-shot cartridge rifles; 1300 fps for lever action rifles; 1000fps for handguns). Smokeless loads may be chronographed and certified by the Judge before the shooter will be allowed to compete.
9-3. The Territorial Congress, in conjunction with the Authenticity Committee and Executive Committee, shall establish and maintain official NCOWS Rules and Regulations to govern approved firearms, calibers, and load, and clothing and accouterments, and range rules and regulations.
Couldn't find a 'minimum' listed in the By-Laws but perhaps one of the Waddies has a Tally Book close at hand and can verify what is written therein. Needless to say, 1,000 fps is enough to satisfy the desire to 'Bang & Clang' of most all CAS folks, however close-in or far-out the targets are positioned.
It should probably follow that smaller caliber handguns such as Pocket Pistols or Derringers in .22, .32 & .38 S&W and other smaller calibers obviously won't fall into the same fps parameters as a 44-40 or 45LC, this is a given due to the simple nature of the product specifications. This should require a specific placement of the target allowing a degree of competence from the Shooter to hit the target and a bit of a challenge as well, i.e., for smaller calibers 4' away may be too close in some cases and 10' may be too far in others. Although some 'feel' that a short-bbl'd 44-40 or 45LC may fall into the Pocket Pistol category because it fits 'into' their Pocket, it can be considered overkill by others, this has been discussed and many fine example pics presented by our knowledgable cadre of posters.
Target placement for larger calibers should ideally be such to provide a common sense approach to safety, a challenge to the Shooter and be visually appealing to all participants.
44Caliberkid's suggestion of a swing pendulum tester is a very doable solution and should be proposed and started ASAP at all NCOWS Official venues. If a registered Shooters loads don't pass the 'Swing Test' they get moved to the Low Power Shooters Category, there will be no wavering, your cartridges hit and move to the prescribe mark or they don't, one way or the other. Those that feel they have to shoot low power loads for whatever reason should be honest and forthright enough to tell the Match Director what they are using and then only compete in an honest and forthright manner against others that do so, for after all, if it is only a competitive edge they seek by utilizing low power loads then they should be honest and manly enough to shoot only with those that can compete equally against them, right? There is nothing wrong in what they are doing as long as it is safe and sequestered, a group of LPS'ers/Low Powered Shooters can easily be scored as well as any others, simply put all 10 targets in one scenario at 5'-10' and let them Nevada Sweep, Samson Sweep, Missouri Sweep, Texas Sweep, Double Tap, Tripple Tap, L-R, R-L then back again. After 5 boxes of Low Powered reloads are expended, all hits scored and the guns put away, the winner can be announced, it won't take much time, they should be done before 10:00 so the rest of the Posses can shoot at leisure. Who knows, what with Maj. Matt's recent conceptualization of a NCOWS Natl. Champion, we might even end up with a National Champion in a LPS category, wouldn't be much glory but then the prize wouldn't be much either, just a simple small faded Pink Feather to go in the hatband on his Gus Crease Hat.
To fulfill what NCOWS proffers, make the target placement challenging, match them to each scenario, simple L-R sweeps don't provide anything for the historical end of the event, make it right the first time and they'll come back the next!
Best regards and good shooting, whatever it is you shoot with or at!
'Ol Gabe