Hello and welcome aboard. The farthest I've shot a 22lr was about 600 yards just plinking at rocks in a plowed dry field. The thing is that a 22lr will loose accuracy when it goes through the Transonic phaze and will be horibly unreliable after that. If you are using subsonic loads, the you will have a slight advantage because of this. However, the fact that the slightest wind will affect a 22 is very evident past 200 yards too. You will have to use lots of kentucky windage and elevation with this round because of the huge amounts of drop at such extreme ranges. Not to mention the fact that the bullet has such little power left. The moral of the story is that bigger faster rounds are more fun at such range.
I used to re-load but now I "hand-load".
-- Well, at least I try