Re: Barrel conture and its affect on accuracy ??
Almost any barrel length can be made to shoot accurately, given enough support and proper load tuning. The key is in the rechambering.
If the chamber is cut cock eyed, that barrel will not shoot as well as it does now. If the chamber is cut better, accuracy will/could improve.
Barrel diameter also plays a small role in cold barrel accuracy. I shoot all types of rifles and barrels. In all cases, if the chamber is cut true to the bore, the bore has no damage and of good/better quality, acceptable crown, properly bedded action and concentric ammo tuned to the rifles wants, the rifle will shoot well.
The only difference with a small diameter barrel over a heavy barrel, is the likely hood of the barrel warping as it gets hot. This shows up as groups opening up.
For a hunting rifle where 1 to 3 shots is all that is usually needed, rarely an issue.