Shoot, shoot , shoot.
My guns are dirty. One of my scopes needs to be sighted in again. And the only triger job I have had, was one i did myself; it's not very good.
I shoot my guns all the time. Each gun has a different trigger pull but I have a feel for each one. Each rifle rests differently on my shoulder but have a certain spot for each.
In some sense it's like shooting trap. You dont draw a bead on the clay,,, you just point the barrell and hit it.
After a while you just sight in and hit the mark.
I'm certainly no sniper,,, but the more I shoot the better I get.
My 15 yr old son shoots more than me. He's also a better shot!
Some day we are goin to slow down and clean our Guns,,, just kidding ,, kind of !!!!