I like the 264WM and have a Remington 721 with a 30" barrel. I have reached 3261fps with a Woodleigh 160gr PPSN so this will put you in the velocity range you want. A 26" barrel also works will with the 264WM, Most will say that barrel life is a issue with the 264 but it depends a lot on how you shoot. I shoot 85gr HP, 95gr Vmax, 100gr HP, 100gr Ballistic tip, 130gr VLD and the 160gr PPSN so there is a wide range of bullets that you can experiment with. There are a lot of 6.5's out there that will work.