Re: 7mm-08 for 1000 yards match???
If you like the 308, then the 223 with 80gr HP or 75gr Amax is ballistically identical to the favoured 175gr load. Recoil is pretty close to zip and you get to shoot lots before your barrel warms up. However, wind bucking is not that great when compared to...
The 260Rem. I love this cal and 142/140gr bullets can easily be launched at 2800fps in a longer barrel. That is within 150fps of the 6.5-284. Easy on shoulder and throat.
You can of course go with an improved 260Rem like the AI or my Mystic. This gets you even closer to the 284 performance with less powder. The 6.5WSSM improved have similar case volume and performance.
Because of new bullets, the 6mm is coming into its own and may very well "Own" the 1000yd game soon. Stretched 6BR or shortened 243Win's are showing up in all sorts of versions.
With the newer 115gr bullets and fast twist, they are ballistically very close to the 142gr MK from 284's. Still pretty hard on throats but much better then the 6.5-284 (???). Way lower recoil too.
If starting new, find out which competition you want to follow. Then build to suit. If just plinking and want a factory rifle, the 243 with 9twist, 223 with 9 twist, or 260 with 9 twist will all get you to the 1000yd mark with ease.
I like the 7-08 alot but the recoil is just that much higher then the smaller cals.
Now if bullet makers jump on the 25cal bandwagon, we will have lots of new wildcats to talk about.