280AI loads?

Hey guys,
Ive got a CBI 280AI match barrel in 9 twist that I'm wanting to work up some loads with a little heavier bullets. It shoots 140s ( Nosler bt and sierra gk) really well. Im wanting to stretch it out some and figured a heavier bullet would be better for that. Was thinking somewhere in the neighborhood of a 162-168gr range. Id like to hit 1k with it...Im not opposed to using heavier bullets. Have several powders, primers on hand to try. Just wondering what kinda loads some of you all may have worked up.
Thanks!
Scooter