For those familiar with Remingtons, their standard sporter contour is .650 or .660 at the muzzle while their mountain rifle contour is .550. I had a LH Winchester .30-06 rebarreled with a 22" barrel in my patent pending "Foothills contour" which is a Remington contour shape but .600" at the muzzle; it has a great balance.
For those not familiar with the relationship between Remington and most aftermarket contours, a Remington sporter with a .65" muzzle at 24" length will be a good bit lighter at the shank and steep taper end of the barrel than a typical aftermarket barrel with similar muzzle dimensions.
