Many times when I go to the range I'll run some of my self defense ammo (factory ammo) just to be sure everything is working OK. Sometimes I have too much fun and on the way home may only have one magazine with my handloads. I try to be careful that I don't do that but stuff happens.
As the conversation was about 185 gr. bullet loads, I don't shoot ant 185 gr. factory ammo in my guns. However, one 1911 I have is specifically set up for target shooting, a Caspian frame with a Colt Gold Cup slide. it's a very accurate pistol and I mostly shoot a 200 gr. cast semiwadcutter in that gun. I have also run a 185 gr. cast wadcutter through that gun with very good accuracy although that load requires changing the recoil spring. The standard spring id a bit too stiff for reliable functioning with that bullet. Pep up the load enough to work and accuracy is nowhere near as good.
I guess the plan must be to tell the bad guy to hold off for a minute while I change from my handloads to factory so that I'll be legal at the trial. (sarcasm)