Definition of an arsenal: An average Texas or Oklahoma gun collection.
Shyflyguy brings up a good point.....the gun is only as accurate as the shooter and only needs to be as accurate as the shooters wants and needs require.
On crossing birds/clays....I always tried to bring the gun up just behind them and swing through....pulling the trigger just as it cleared the bird....
In actuality the gun's lead was traveling faster than the bird, so the barrel was actually getting in front of the clay more than it seemed.
For me, it was the most consistent way to establish a lead and I rarely pulled the trigger too soon.
Once upon a time, I was a pretty good wingshooter. I once shot a 23 on skeet which impressed my younger puller...,then I really blew his mind...I usually shot trap and didn't bother to change chokes....I did that with a full choke....
Nowadays, I could probably shoot 23 with an improved cylinder....and 3 boxes of shells.......Point being, you have to practice to be good.....