Now that I bought the Ruger m77 6.5 creedmoor target / varmint. what factory ammo would shoot best in this 28 inch barrel with gray laminated stock ? I want to shoot 1000 plus yards. Hornaday makes a 142 gr or 143 gr ammo but I cannot remember what it is called. Maybe some one can post a picture of box ? Also I don't own a chronograph and don't know any one in davenport Iowa that does , what do you think my fps will be out of this gun with 28 inch barrel ? Thanks. Marty