This may seem counter intuitive, but.....
Instead of using Dove and Quail loads on Dove and Quail, I use target loads.
Why? Premium components, including round, HARD shot that not only stays in the pattern better, but carries more energy into the target, ensuring quick and humane kills. A little more costly, a lot more effective...
Also, if you've not been on the clays range with your dove gun, now's the time.
I suggest not only using your dove gun, but wearing the togs you'll be sporting for the opener. Trust me....