I had bought a whole bunch of Berry's plated bullets once. Let's say in .40 cal, some would actually caliper at .399, others at .400 and some still at .401.
I was at a steel plate match thinking "WHAT THE HECK!" because they weren't hitting the plates. I shot them on paper and sure enough out of a 10 shot group I'd have at least 2 fliers 6 to 8 inches, maybe even more from the center of the main group.
so while I am no expert when it comes to pistol accuracy, I have a gut feeling for what a group shot standing freestyle (both hands) should look like at 15 yards, and then again at 25 yards. And no!, I don't bother shooting pistol at 50 yards either.