You could be correct.
The barrel length on the Cadet was supposed to be 29.6. Barrel length on this is slightly shorter at 29.3. It is possible that the muzzle sustained some damage and the owner repaired it by cutting of the barrel ala. hacksaw.
It has a serial number which matches a Cadet rifle. It also has a trigger guard which is a match for Cadet trigger guards
I am traveling until Thursday but when I return I should have all of the stuff I need to load some bullets.
Once I do that, I shall see how she shoots.
My reading of history convinces me that most bad government results from too much government. Thomas Jefferson