YepShouldered barrels are fast to install for sure. Of course, like I said you can put a bit of blue loctite on the the very last thread of the nut and once headspaced you have a shouldered barrel.
Funny, my wife and I shoot Kaugers, as do my friends, and Lauren's sons, and I could make shouldered barrels but all of our rifles have the nut. In case I want to change it over to another project rifle that's not a Kauger. Or sell it after testing.
The Barrel nut setup provides some flexibility.