Tom,
I get under a half moa @100yds but shot at 900 have been getting an average of 21". The wind is a big factor. I've shot some smaller groups but that's pretty much what I can do on average. I suppose if I could find a day without any wind I could get a smaller group.
Zeus is ****ed at the world right now.
I couldn't figure out how to get the edited quote to highlight. Tom
Theoretically, if you can shoot 1/2 moa, you could shoot a 4.5" group at 900 yds (in a dead calm and no mirage), but realistically under the best conditions, you might shoot an average 8-10" group, which is not bad shooting. With the right rifle, in the same good conditions you could probably get into 4 - 5" groups. 900 yds is a good test. The next 100 yards to reach 1000 is not that much more difficult, but even theoretically, will open groups a little. I don't trust 3 shot strings, I do trust 5 shot strings, and 10 shot strings leave absolutely no doubt.
If you use a good scope and fire a shot every minute or so, you may be seeing barrel heat mirage. It can screw you up. I used to use a barrel mirage strap to block it. It helps. I don't know what the rules are now, but we used to have 33 minutes to fire 22 shots (including 2 sighters), so we were steady plunkin' away. Also, once you decided what conditions you were going to fire on (the most prevalent combination of wind, light, and mirage), sometimes you would shoot just as fast as they could get the target back up, while those conditions lasted. Then you might have to wait for several minutes for conditions to get back where you needed them to be. It was a crap shoot for me, because I was basically a lousy wind doper, but I loved the 1000 yd matches. I believed they separated the real riflemen from the rest. I also needed really good long range rifles to compensate for my own shortcomings. I always wanted to know that when I booted one out, it was me, not my rifle. Bottom line, if I did my job, the rifle always delivered. Unlike F-class, this was all belly shooting, and no part of the rifle was allowed to touch the ground. Only meat and bone. Oh yeah, don't leave your ammo in the sun. It can really screw with you at long range.
I like your decision to take in Old Dog. You're lucky if they don't go to the ground once in awhile. I still think Zeus might be in a better mood if you let him have his own child molester to gnaw on.
Good hearing from you again, Tom