The .316 diameter would be with cast bullets. If you could find .314 diameter jacketed bullets they would probably work with a .3135" bore, but don't go larger than that, and use a starting load. Jacketed bullets don't give much at all, and you could run into a pressure problem REAL quick.
Contact Vern(I read about this same problem on another site) at
Glenhills Cast Bullets and tell him your problem. He can set you up with some cast bullets sized for your bore. He can probably tell you where to get the correct jacketed bullets for your rifle too.
