I think the introduction or availability of detachable magazines changed the concept somewhat. The hand carry at the balance point might have been compromised, but needing the scope mounted forward for quick or easy reloads was eliminated.

With detachable mags, the bolt can stay closed on a chambered round while a new/full mag is inserted, or the only one topped off.

But all this presents another conundrum. The mag. If it fails or is misplaced, is the rifle still operable? My Ruger with controlled round feed will need lot of dexterity to get a round into the chamber without the mag to help the feed. Or,,,,, I'm missing a trick.

No free lunch.

I like scouts, or the concept. And like to discuss them. I don't think the idea is set in stone. Cooper would say yes, but things have changed. Alternatives, that might work as well or better might be available.