Question about changing bullet seating depth AFTER taper crimping.

Are the rifle or pistol rounds you are enquiring about? I only crimp pistol rounds and have had no problem making a seating adjustment afterwards. No need to re crimp in my opinion
 
Depends how much you crimp I suppose. FWIW I have done it on my a r15 blackout loads… but mine were very lightly crimped. I was not running them for accuracy, and they would not fit in one of my pmags for some reason. No clue what was up with that one, but I just nudged them in a tad to clear. They all shot just fine.