Forgot towear earmuffs(righearonly) when i shot at shootingrange(1shotonly). i felt that the soundwaskinda filtered after, but now it is okay.it'sbad?

Don't do it again!: You're okay, now, right? So it's not bad. But don't do it again. At some point, you're going to lose your hearing from repetitive exposure to loud noises. Similar risk if you attend loud concerts (what pop concerts aren't loud?), especially if you're close to speakers. Or if you use earphones/headphones/earbuds & turn up music loud. Don't do it! Protect your ears now.