I have an accurized Remington 700 LA with, HS DM. Bolt face is setup for a dakota .545. Want to build a 6.5 for elk out to 700 yds. Have killed close to 30 using a 7-330 dakota at medium to long ranges. Will be reloading, and would like to have barrel length at 22 inches plus suppressor. Would +P chamber, but tired of fireformiing/neck tirning -so donw with that. Will be on a rokstok. Any thoughts for the cartridge?