I believe Good Cheer (OP) already has an old bolt action rifle, and is wondering what to chamber it in (new barrel? he did not say). To take a .32 cartridge and neck it to .30 is nothing - easy. to consider any of the old .32 cartridge is thus highly appropriate to his challenge.
Yes, the Enterprise was designed as a test bed. It is in the Smithsonian, out at Dulles. We were there once years ago and it was roped off and the engineers were using it to try to solve something that was going on with the one that was, at that time, orbiting in space.