Scope on the rifle in the rifle case is as protected as it’s going to get in a carry-on. I use the limited space in my (appropriate-sized) carry on for things I need on the flight and things I need if I arrive and my luggage doesn’t. And my binocular. Don’t see much upside to putting my scope in my carry on, and putting it in there is just one more potential sticking point at TSA. Yes, it’s allowed, and yes, I’ll eventually prevail, but why give the numbnuts something to be mistaken about? I don’t live in Germany, where the officials both know and follow the rules, I live in the USA.