A few years back the NSRA proposed the idea of using Air for 25yd and proposed a trial which I don't think ever happened, my wife tried it with her at the time Walther LG300 with no mods just adjusted for length and butt plate position and a sling, on a windless day, and said it was easy, and shot her .22 lr average. She shot several cards with a best of 99.

Some years later I informally asked the NSRA, can't remember who, if they had any interest, as I think it would suit youngsters (no FAC hassle), and the answer was no.