I know you said "not a 223", but have you looked at the 22TCM cartridge.
They are coming out with a small bolt action that uses the 1911 Magazines or a stock five shot. The 223 bolt face opens up a lot options on light rifles....if you wanted a semi-custom...
The case is 12-14 grains (AA1680) right in the Hornet capacity and bullet performance/options.
Just an idea...
Bill
Link to pics of 22TCM Rifle:
https://www.google.com/search?q=22+T...&bih=862&dpr=1
The other Out of the Box solution would be a 17HH CZ 527....