Budget Shooting supply has the Hornady SP bullets for this caliber. I have loaded them and found them very accurate. Budget also sells plated 110 bullets for the M1Carbine. I find these also shoot very well.
For general plinking I load a 95gr SWC mad for the 32 ACP. Bullet barn sized them .309 for me, and they are very, very accurate. Load them as mild as possible, that will cycle the action, because lead bullets are not good at high velocity.