I've owned and shot tang safety 77's in 24" RT RS in 257R, 22 inch in 22 250, 308, 35 Whelen, 30/06, 300 Win Mag. I'm pretty sure I had a 243, 7mm mag, but they were a long time ago.
I've handled 243, 250 Savage, 270, 7x57, 338 mag, 350 mag, 458 Win Mag all in 22 inch, and 358'S in 20". I've owned or handled 22 250, 243, 250 savage, 270, 308, and 30 06 in RLS 18.5 ". I handled a 35 Whelen RLS, but I'm pretty sure it was a well done rebarrel, as the front sight was just a bit too close to the muzzle. I also touched a 416 Taylor that I think was 22". There were a couple 404 Jefferies that I've not seen, but saw photos taken by a guy I consider reliable. Last I heard two of them were in Alaska. The 7mm RM, 300 WM, 338WM, 458WM, 416Tand 404 may have been 24 inch barrels.
I'm sure there are others that I've seen on Gunbroker, but like that little Whelen some could be edited versions.
I've not owned any flat bolts.
Bfly