You would think. They are typically shot with 115 grain FMJ range ammo. Would that handicap them?
I've not spent much time shooting groups with a 9mm. When I shot that H&K P7, it was a range rental with factory ammo I had to buy from the range, and I recall it shot ragged holes at 15 yards while standing, unsupported. I don't know if some weights are more accurate than others, but IMO, the pistols I saw in those videos I watched should be doing much better than 4"@25 from a bag, even with 115gr factory ammo.
I may be giving them more credit than they deserve but a master level action pistol shooter is certainly a better shot than me.
I should've pointed this out in my earlier reply, but as a former master level revolver, pistol and rifle shooter myself, I can tell you there's a wide variation in skill and motivation, even among master-level shooters.
A "master" classification simply means you know, and are reasonably proficient at the basics of your game. In the case of action shooting, the game is to win matches by, among other things, getting the best balance of accuracy & speed. "Don't let perfection get in the way of a good score" is an effective strategy.
Many master-level action shooters will rarely, if ever, shoot a slow fire group to see how small a group they can get, and when they do, they're often satisfied with "good enough", which isn't likely to be very impressive (compared to someone who actually practices this). But they're also the ones in danger of plateauing, IMO. The ones that will progress (or have progressed) to Grand Master do likely work on their fundamentals and can likely shoot a respectable group on demand. The
very best could probably put some fear into a whole bunch of very skilled folks at Camp Perry if they were so inclined.
Bottom line: The accuracy that the 9-hole folks see is what
they see, and not necessarily representative of the gun's capability. As I showed earlier, even a bone-stock polymer gun (shot unsupported by a revolver shooter) did better than they did off a bag.