The reason for using a 22LR is that it has a lot of bullet drop even at 100 yards.
Even more appropriately is that 22LR standard vel run subsonic all the way much, easier to duplicate/imitate LR w/o having to deal with transonic issues.
Yes, a 22 LR 40 grn SV ( 1140fps) can and will shoot sub MOA out to 400 yds, and 400 yards with such a setup approximates 1000 with a high intensity centerfire.