Yes, that sounds good to me. Volume for volume is a good way to start.
But, before you go out into the woods, you really need to have a pattern board session. If your local gun range doesn't have a shotgun area with a pattern board, it's not that difficult to conjure one up. You will need a fair size cardboard box, maybe 30x30", some butcher paper, a roll of masking tape and a big rock. Put the big rock into the box to keep it from moving around, then tape a piece of paper to the box. Mark an aiming point on the paper and let rip. Have fun !!!
John (Bigsmoke)