10" .357's will be rare. The more common long length in that caliber will be 9", as the 10" version would not make the IHMSA 4 lb. weight limit with a Pachmayr grip, so the barrel length was reduced when the gun was introduced, to sell to the Silhouette crowd.
My 9" Mdl. 353 (83) is a true 1 MOA revolver, although I'm almost never a 1 MOA shooter.