mstarling and Ray
Both of you make valid points in your last few posts.
However I have the ultimate solution IMHO.
Use a double rifle with iron sights that you like, to the distance that you are capable with, depending on the shot presented. Have your double rifle fited with QUICK ATTACHABLE [most people call them quick detachable, but it works both ways

] scope mounts. Carry your scope in a belt holster. When a situation occurs where your scope is necessary, just attach it to your rifle and shoot. If on the final follow up a scope in a hinderance, remove it.

I have been using this system for years [pat. applied for]. For a small royalty you can too.