Originally Posted by BEEMAN
I would look at a 6.5 Sherman. Shoot a 160 Matrix close to 3100 fps and doesn't use a ton of powder. Barrel life is also ok. That is the route I went. My gun is still in the process of being built but I am sure it is going to be awesome.
This is probably the best option IMO too. 140 grain Berger: The 6.5-284 is more but I am not sure where the breaking point is. For example my buddies 260 with 26" barrel maxed out at 2800 fps. My 24" 6.5-284 maxes at 2970. I tend to shoot it at 2940 though. I will have a 27" barrel on it in 2 weeks. I should easily be able to go 3000 fps on a medium load.
160 Matrix. The max my 24" will go is 2760. 2730 is safer. With the 27" barrel I will probably only see 2800-2825. If you run the ballistics on all of this you get a couple hundred yards more from the 6.5-284 then the 260 max.