I have a couple of good loads for 600 yds. using 8208 but they haven't worked well at 1,000. I think the powder may be a touch too fast, but I haven't tried any of it lately. Although I never shot it across a chronograph some of the later 8208 I bought seemed a little slower than the first I bought so it might work a little better now in the longer barrels. But, can't get any 8208 either.