I've got my new Ruger Single Seven in hand now and I think I have a problem. I've slugged the barrel and checked the cylinder throats. Results are:
Barrel slug: .3134" (slightly tight where threaded into frame)
Throats: .315 using plug gauge
The problem arises because I intend to shoot only cast in this gun. If I use a boolit sized to .315, I don't think it will chamber. This possibility was suggested by 2 dogs. Since I don't have a tubing micrometer, I inserted a plug gauge into the .327 case and took a micrometer reading of the OD. From that I determined the wall thickness of the case to be .0127". If I seat a .315" boolit I end up with .3404" OD of the loaded round. A .340 plug gauge will not fit the chambers. A .313 boolit would give me a round that probably would chamber but would be .002 under throat size. Might even be a loose fit in the barrel.
All this is measurement and arithmetic so far. I don't have any boolits to actually load. Since standard practice is to fit the boolit to the throats, I don't know what to do at this point. I don't want to be forced to use jacketed bullets. I would appreciate any insight or suggestions.
BTW, I've messaged 2 dogs about this and may get a suggestion from him also.