In it I basically explained some of the things that can make your shots go astray; and i further explained that sometimes your accuracy may go off target somewhat through no fault of your own, but rather due to certain aspects of the ammunition you are firing. It kind of boiled down to a discussion of "what in hades am I suddenly shooting so poorly at 50 feet, when I had been shooting great at 21 feet sort of a thing. My conclusion was that if all things considered were equal at both distances, then the likely culprit was that you were shooting .22LR ammo, and that trajectory and or quality control of the ammo were likely at fault. No, I won't bother to explain more here, go to the link and read what I wrote previously if you want more explanation.
What I will do here though is I will give you some pictures of targets to illustrate exactly what I meant in that other piece. Look at the pics, and go to the article, and you will understand exactly what I meant:
Remember that all of these targets were shot with the same gun, a Ruger MKII Pistol, by the same shooter, using the same technique and hold. Federal Champion and CCI Mini Mag both showed the most reliable grouping between the 21 foot and 50 foot distances; and it is a pretty sure thing that quality control had a lot to do with it. As to the higher shots at 50 feet, that was due to the trajectory aspects of .22 LR ammunition.
All the best,
Glenn B