I have been shooting Skeet this week in between snow storms.
Thinking about the "marginal bird" and my efforts to claim it.
With the borrowed gun I'm using, I hit low 7 on the left.
The mount is about maybe 4-5" left at 20yards, so by rights, I'm shooting 8" or so off my sight line at 40 yards.
So, why wouldn't I try to optimize this shotgun, (or 1 like it) to capture the marginal bird?
For me, and this has been consistent for a couple decades, I lose 4 birds/rd when my practice drops below 100 targets/mos. Crank it up pre-season, and I shoot some straights. Lay off, and uh uh.
I'd say that to compete at an elite level, the coaches probably notice consistency problems at less than 1000 targets a week.