For plinking, I’m happy with the Magtech supersonic. About 0.52/round at my local store. Slightly cheaper on line. www.sgammo.com
Supersonic from the 10.3” pistol is loud. Like an AR. Supersonic 123 grain has about 1200-1300 ft lbs ME.
Subsonic, unsuppressed, is much quieter. Like shooting a .45 ACP. But a 200-220 grain subsonic has 400-500 ME. No surprise if you think about it. About the weight of a .45 ACP at about the same velocity.