Don't feel bad.
I was working my club's (Monkeyleg's former club up here in WI) hunter sight in clinic as a R.O./line-watcher/helper two weeks ago.
This one guy was trying to sight in his scoped Benelli with Hornady SST's (Google the price per box of 5, don't forget to add shipping, or retail markup & tax...) at 25 yards, and he went through
one hundred of them, chasing the holes all over his targets, before one of us realized what he was doing, and told him to not adjust his scope until he'd gotten a three shot group to work from.
Although, by then, I think he was getting confused, because there was already a dozen holes in his target by the time each cease-fire was called.
I don't know if he ever got sighted in right, although he seemed happier by the end and had moved his target out to the 50 yard berm... Although I did help him clear his shotgun... when the magazine cap came loose and it spontaneously disassembled itself in his hands while shooting it.
And I KNOW he went through 100 of them, because after everyone left, and we were tearing down for the day, I collected all the fancy brand new once-fired high-brass hulls to make hot slug reloads for my Saiga 12ga and counted them.
He burned through anywhere from $200-300 worth of slugs. For that, he should have just bought a butchered cow.
There was easily $150 in factory new once-fired brass on the ground when all was said and done. The "hunter only" types of shooters are definitely a different breed... I'll tell you that.
This other guy was doing the "opposite thing" with his scope too.
Then there was the poor kid who's dad sent him alone to our sight-in with a friend and his father, and a box of .35 Rem for his .30-30...