I am new to the 327 game (4.2" SP101 aquired last November).
I am a cast only shooter and my primary intended use is highish volume offhand target practice with lowest achievable cost. For this gun I made my own 55 gr mold (see attached images).
They shoot pretty good, but I am still working on some issues (low volume charges that give big velocity swings between barrel down prior to firing and barrel up prior to firing). I will post more on this later.
However, as I was going over this short thread (he said sarcastically), I noted the absence of a discussion that I expected. The 327 is a great platform for polymer coated cast bullets. The guys at Castboolits who figured out what we call ASBB PC coating have enabled me to fire my 12 BHN cast bullets at full power (or close to full power for a few such as the bottle neckers) for all the handguns I load for (30H, 30-30, 327 fed mag, 357 mag, 357 max, 44 mag). With potential use that involves terminal ballistics (4 or 2 legged), a hardness in the 12-15 BHN is probably about where you want be.
For those that do not make their own projectiles, I had no trouble finding multiple vendors. These below seemed pretty good:
http://missouribullet.com/details.ph...y=20&keywords=
https://www.badmanbullets.com/Online...Polymer+Coated