Its not truly the loudness as she was wearing ear protection its the boom which is felt rather than heard IMO. She will shoot small cal like .22 lr all day long but that BP or shotgun boom makes her cry.Ear plugs go a long way on that too loud thing. Just saying.
I love the BP boom that's the best part IMO.It is a different sound I gotta say, I don't find the blackpowder boom uncomfortable but I reckon others do.