CORRECTED: I bought an adapter that holds a .32 acp pistol cartridge (NOT 32 SW) in a .308 rifle casing. The Alaska company sells adapters for many caliber combinations.
Before firing this .32 in my .308 I checked a Hornady reloading manual for bullet size. the .308 bullet is actually .308 but the .32 is .311

What do you think?
a) it's OK- its your rifle.
b) No! .003 is to much
c) let us know how it went