My question is why do organizers keep putting meaningless limits on minimum muzzle energy (in this for 200fpe) ? If you use a light on the target or whether the hit will be visually seen by moving the target, that is up to each shooter.
If he knows he has equipment he can shoot accurately at that distance with, and knows that the impact energy is still sufficient to get the target moving due to the high BC slug, then these requirements are meaningless.
If there is a shooter who will not be able to hit the target, or it will be impossible to sure tell after a hit (due wrong energi or BC slugs), it is only to the detriment of that shooter, but it does not limit others shotrs.
650 yards is a normal distance for which even 100 fpe is enough for airgun. In Ireland and in the USA, .22LR is shot competitively even at 650 yards range, while the impact energy of .22LR due to low BC is half that for airgun and 100fpe than from airgun and suitable slugs, even just .22 calibre.
So what's the real reason for these minimum power limits?