I believe that the two hole targets started for a "nearly innocent" reason. The most widely used trap target thrower across the nation was the Winchester 1524X. It has an angle adjusting, rotating plate with different holes drilled, threaded and marked 1,2,3,4,5. near them. A threaded stud is screwed into one of the holes to determine the target angles. The greater the number the wider the angles.
The #3 hole target was the norm and that hole produced a target's greatest angles as a straight-a-way from posts 1 and 5.
As years went by most of the #3 holes would "woller out" and wear out the threads in the rotating angle adjusting plate. Not wanting to throw the greater angles of a #4 hole setting, shoot managers went the easier way and put the stud in the #2 hole. Most of the time they'd never replace the rotating adjustable plate. Some even drilled and tapped another hole in between the #3 and #2 hole and threw 2 and 1/2 hole targets.
Unfortunately, I guess, and eventually, people liked shooting the easier targets and started voting with their pocketbooks. They preferred shooting at the clubs throwing the 2 hole targets and avoided the 3 hole clubs. Well, you can guess what happened ... the pressure to attract their shooters back, the clubs throwing the older, more difficult 3 hole targets succumbed to the pressure and put their machines in the two hole.
What started out as a "quick fix" to get through the shooting day turned into a trend and the shooters preferred it. Right or wrong, the easier 2 hole target became the new norm.
One year (maybe 1995) however, some of our EC members thought we should go back to the #3 hole target. There was some very vocal support to do that too. They made the change and even the Grand threw #3 hole and 50 yd. targets (regardless of the wind speed) but the negative grumbling was so intense amongst the general shooters that they were forced to take another look at target flight and angles. I think (editorially) it was sort of a "perfect storm" moment for the ATA and we were at the beginning of a downturn in shooting anyway, so the urgency to make the #2 hole target the rule was natural in an effort to hold on to as many shooters as we could.
So you see, that the target angle change that made the "2 hole" the most popular was more "evolutionary" at first. There was considerable and heated discussion as to which would be defined as the rule. The ATA made the change permanent by choosing to define the angles that had evolved from the target angles thrown by that old Winchester 1524X trap set in the it's #2 hole. The choice was made for economic reasons. There was fear that making the game harder had shown it was not in trapshooting's best interest. Simple as that.
Here on Trapshooters.com the debate about whether we should be throwing #2 or #3 hole targets boils on. Frankly, I see both sides. Isn't it just all relative, especially to our newest shooters? I think one of the most attractive things about trapshooting is that it is one of the most economical clay target sports. How hard the targets are thrown is just relative ... but that's just me.
NOW DOUBLES .... THAT'S A DIFFERENT STORY!