Dislodging the bullet from its case requires 10,000 PSI and that is science from H.P. White labarotories
That didn't sound right, so I resized a .45acp case, seated and taper crimped a bullet in it, inserted it in a 1911 barrel, cranked my 2 stage air pump up to 175 psi, applied a blow gun nozzle to the primer pocket, and easily unseated the bullet with a mere 175 psi. It stopped when it hit the rifling, of course, but that is science from Jbar's shop. A primer alone can dislodge a bullet, and it certainly doesn't generate anywhere near 10,000 psi, and probably not more than one or two hundred psi, tops.
Sometimes the squeaky wheel gets replaced...