if ya can't see it ya can't hit it . all joking aside . I think 15 on the high side is a little low for shooting at 1000 , but this depends on the target size .
I just bought a 8 - 32 NXS for a rifle being used for mostly target , but also hunting . just read the specs , as the power increases you loose elevation adjustment . on the NXS scopes the 5.5-22 has 100 moa elevation , and I think that's why it's so popular with the long range guys . the 8-32 has 65 moa elevation . I have a 20 moa rail on this rifle so it will still get me out there a long ways . I just got out a night force brochure that came with my 8-32 . here are the elevation specs . this will be total elevation travel . so half of the travel is up , the other half is down.
3.5-15 NXS has 110 elevation
5.5-22 NXS has 100
8-32 NXS has 65
5-25 ATCAR has 120
5-25 BEAST has 120
8-32 BR has 50
12-42 BR has 40
15-55 comp has 60