Can someone send me a somewhat local source for .38 SWC and .30 carbine bullets? (preferably jacketed, although I might just go with a big name brand for them)
Four Seasons has a pretty good supply of components. You won't find a good local supplier as shops charge a lot of money for components (they have to make a living). I would shop around for components locally until I found what worked for me and then make bulk purchases direct from the MFR or wholesaler.
If you're in for a short ride, Bullseye in Woonsocket RI, (just over the Ma border) has about everything you could want. That's their primary business.
I decided just to make the run to KTP. Actually, I ordered the .30 carbine bullets, bought the .38s at Northeast Trading, and bought .308 168gr BTHPs from KTP (Sierras)
KTP is a great place, just wish I was still commuting to class up at UNH every day so I could stop in more often.