Bigger guns are louder and therefore riskier as of Rust's latest update, with other players able to hear you from 'much further away'

In short, the change lends greater tactical emphasis to your choice of weapon, with larger guns now acting as a louder dinner ...
PCGamesN

New Rust update makes gunfights much riskier, so watch that trigger finger

A new Rust update today has rolled out a heap of the fixes for some of the survival game's longest-running frustrations and foibles. Developer Facepunch Studios has been deploying some hefty overhauls ...