I've shot the old naught six for 25 years and I've tried a bunch of different loads. The factory round that works best for me is the Winchester Supreme 168gr Ballistic Silver Tip. My rifle puts 'em into around 3/4" at 100 yds, and they've killed every deer I've ever shot with 'em with just one round fired. I've shot 'em as close as 12 yds and as far as 347 yds (measured with a laser rangefinder by the way). I'll never shoot anything else.