Originally Posted by JonM
If i didnt make it clear the 45 version will be quieter with a 9mm than the 9mm version due to the slightly larger internal volume of the 45 osprey. But your only going to see the diff with testing gear
Respectfully, I disagree. The First round pop will be louder on the .45 can with sub calibers. The rest of a string of fire will be pretty comprable.
A 9mm with 147gr Subsonic rounds will be quieter than any .45 ACP. The apeture does make a difference.
I pretty much own all of Silenerco's Pistol cans, and run subsonics in the .45. The Osprey 9 is quieter on 9mm than the Osprey 45 with 9mm.