Dvor? You have to join up. I'm not a joiner.
I can hit the 10 ring, 3 shots-<3 seconds with a $12 barrel. Would I do better with a $300 barrel? If I measured my groups with a micrometer, maybe. I get a barrel, a fancy cup of coffee, lunch and a 1000 rounds of ammo for the price of a fancy barrel.
Every time I go to the range, I see people with $1000 pistols that can barely hit the paper. I don't count their holes vs. rounds fired but I would bet it is not the same number. Last outing, a guy was shooting his AR-15. I glanced at his target because it was at the same distance down as my target. My groups were better by far and he was shooting a rifle. I guess the bullets didn't have time to settle

After I put enough rounds in the center, I will shoot at some point on the right, top, bottom and left. It's pretty obvious, my contribution to being more green. His rounds were evenly spread all over the target so I don't think he was trying that.
Years ago, I was at the range with a friend. He was showing off his new Makarov. I knew this design to be pretty accurate because of the fixed barrel. He gave me a mag to try it out. I fired one round to see where it hit, then fired the rest of the mag. As I pulled the target in he started laughing at me because there was one hole in the target center. This particular target had a miniature scoring target legend for scoring instructions at the top right, about 3"X3". I politely suggest he look at the scoring target. Six holes in that. F you was all he said.