One hundred feet or yards might be a far distance for the shooter. The pistol is quite capable of good accuracy at these distances as noted in several posts and references above.
But I believe if you can shoot well at long range, your close range shooting will be much better. The basics must be correct to hit at long range. Once the basics are correct, I believe it helps with close range work.
However I will concede most should probably just stick with standard combat ranges, unless they are willing to make the commitment to really work on long range shooting.