No, No, NO!!! You're procedure is mostly correct but you left out a critical step! The ball/bullet MUST be pushed back against whatever powder charge you get in the chamber! Leaving a gap between the powder and ball can create the "blocked barrel" syndrome and can be downright dangerous!
To the OP & his situation, I would think that smacking the butt of the rifle would dislodge even a .22 bullet from the throat but that still leaves a lot of powder floating around in the action, never a good situation with lots of very dangerous possibilities.
If you just absolutely must seat against the lands, the rifle must be held upright when removing a loaded round, just to avoid the powder problem. Of course, if you jam the bullet into the throat far enough, then you would of course have a means to remove said jammed bullet very high on your check list of things to bring with you... right?
Removing the bullet using a partially or fully loaded case is asking for trouble... bad trouble! It might work, maybe even a few times but the one time you crush the neck of the case because it didn't line up perfectly to seat the bullet in the case and... well, I certainly don't want to be around when that little bomb goes off! Reloaders all know how easy it is to mess up a case with the wrong die or just having the case not fully inserted into the shell holder. No way I would try getting that bullet out with any method other than something going down the barrel to push the bullet out. Period!
Cheers,
crkckr