I generally buy cast pistol bullets .357 and .44's. But when I started shooting cast rifle, I got a couple of Lee .38 TL moulds. 148 DEWC and 160 gr SWC.
Neither of these shot well in my Colts. I didn't size them, just lubed with Lee Mule snot and loaded. The other day I measured them and found that they had .360" driving bands at the front and rear. The TL bands are .357 but the front and rear bands are ~.359-.360".
Colts have the reputation of being tight bores and I wondering if I should size them to .357-.356? I don't need Super Hi Vel loads just hole punchers/ plinkers for clays on the 50 yard berm.
Have I been doing it wrong?