Well, my first reaction is they have built some really neat devices. But it aint shootin'. Then again some people feel that way about benchrest of regular rifles. Useful for sighting in and testing ammo, but it isn't shootin'. Not like 3 position, or silhouette or something.
I would like to know though what groups rimfire rail guns shoot.
Does anyone know? Some of the targets I have seen pictured of centerfire rail guns look almost all like one hole groups. Would
be interesting to know just what rimfire ammo is capable of since it usually is considered more variable than hand loaded centerfire. If rimfire rail guns shoot one hole groups, it would make you think the ammo is good enough not to be a problem.