No, the 22 Mag will not fit.
.22 mag and .22 LR are not the same. So, no.
NO! The .22 mag case is larger in diameter than the .22 long rifle case thus the chamber of a .22 mag gun is too large for a .22 long rifle bullet. If the bullet does fire, the case will split with unpleasant and innaccurate results.
it depends on the model .22, in most cases the .22 will be more accurate because of the superior rifling in the barrel
roughly about 22 miles accurate
Yes Marln made a 22 mag auto loder model 922
Impossible to answer as asked. Factory or custom?
Yes.
Not currently
50-250 usd
Depends on the action. Not a good idea.
900