We have been doing this for about a year now. Those guns Flex posted are a friend of mine ,one is in 260 Remington ,the other is in 7-08 , I have a Savage Striker in 260 rem that I put together myself and a XP-100 in 260 Rem custom the a gunsmith friend of mine put together for me.I have done the math and the leg work and they will do the job to 1200 and then some .If you do the work the 260 in 14'' / 15'' bbl's will get 2500/2600fps and shoot well .I use Lapua 139's,and have used Sierra 142's and they work well . My Striker will do .5'' at 300 yd's and so will the XP . I'm going to group these new guns at 600yd and 800yds this week . I have no problem's hitting 15'' circle's that we shoot in our match's from 200 to 900 yds . In the last match last year in Oct, I went 15 out of 18 the misses were one at 500 and two at 900 ,windage problem's . I'm having a ball learning new things at 60 yrs old ! Maybe Kyle will post my two rear grip gun's when he has a chance . COME ON IN AND GET YOUR FEET WET,its fun , it make's you giggle like a school girl when you hit something and 3 seconds or so later your hear the CLANG or clang as it my be !!!!
Dale