I would bet you'd freeze up entirely, not even getting to your secondary if it was IRL.. having no real experience in that area.

Now, with training you could maybe pull off some John Wick shit at the range.. but not in real combat, not without countless hours of proper training and trigger time in a shoot house.

Most Marines I served with that were new to combat, forgot about the simple TRB protocol with their rifles, let alone remembering they have a 1911 on their thigh. This game has got it fairly right in the switching of weapons.. the issue is the mentality that you can run in like Rambo, pulling out your pistol and mowing everyone down. Sure, you might pull it off.. but when you get killed because you moved in too fast and forgot to count your rounds.. well, learn your lesson and do it better next time. If you want some help, I can teach you some IRL tactics in-game that will work out quite well for you. Simple go to plans, that always work better then getting caught with your pants down. ;)