I read that article too and it is really helpful in thinking about load testing. Also check out Jason Baney's article here: http://www.6mmbr.com/laddertest.html
I'm not at all interested in going out to 1000 but can still apply his ladder testing methodology at shorter ranges. One thing that Treo mentioned was load testing farther out (and obviously Baney is entirely concerned with that) but maybe having to settle on 200 instead of 300 because of wind.
From Baney's article and some other things I've read lately (mostly in Bryan Litz' book) I think it's more important to be concerned with the vertical spread, which is generally not affected by wind much...at least at a flat range. I've taken to shooting more out at 300 while load testing. Last time out at the range I got some horizontal spread at 300 (as much as 6") but all my verticals were within 1 1/2" on the load I brought. The only difference I was testing this time was seating .308 rounds at 2.79 OAL vs. 2.84 (the max I can fit in my magazine). Both grouped the same vertically and had the similar velocities but the 2.79s shot the wider groups. Could have been the light wind.
If you think about it, an animal's body is wider (longer) than it is high so even though I don't want to waste meat with a poorly placed shot, I'm not as concerned with some horizontal spread as I would be with a vertical spread of 6".
Forgot to mention: If you use Baney's color-coding method, you can now buy sharpies in lots more colors.
Edited by jonoMT - September/23/2009 at 11:39