Both the Hornady and Speer manuals have information in the pistol section for rifle cartridges. Don't have them in front of me right now, but I do believe the Hornady book has .308 Win for pistols. Otherwise, the load data found in the rifle section will work. May not be the fastest load one could use, but it will work. I shoot the same ammo from my .30-30 Contender that I load for my rifles. Also, some of the people I know shoot factory ammo in their .243 and .308 Encores.
Always start at or around the minimum load and work your way up on the powder charges.