I recently purchased a remington 5r with the 20" barrel. What is my max effective range on targets and on deer size game? What bullets would you guys recommend? I read that the 175 smk's would stay supersonic out to 1000 yards. Is this true? Would the 175 berger vld's perform the same? What about a 168 berger vld? What kind of muzzle velocity do I need to be supersonic at 1000 yards? Any help would be greatly appreciated.