Gunsmithing 308 bore?

Re: 308 bore?

The whole point of the tight bore is to get the higher pressures and velocity. For subsonic there's no need. Bore not really important I would be looking at the twist rate for your given bullet choice.
 
Re: 308 bore?

try running 32 cal. lead bullets through the .300 bore. there's a guy at my range doing it accurately and safely.

they are loaded with 6 gr of something, i cant remember what off hand but it is a popular powder.

i imagine your trying to push out jacketed .30 cal heads for variety, but this could give you another option.