I use a Johhny Stewart electronic caller.Fighting crows works the best for me.Lower the volume as they come in.SOmetimes it helps to get infront of the caller on call shy birds.When they get real smart you can figure which trees thery like to sit in,and pick them off with a .22 or .177 rifle whichever you prefer.I like to let a few birds come in before I start shooting.If you pick the solo bird off the rest won't usually come.I generally use my 11-87 12ga auto.Generally I use high brass 7 1/2's,but 6's work great for long range.I usually use a modified choke,but depending on the average range I will change chokes.I usually keep my choke tubes with me in my electronic calling case.We hunt near a landfill.Oh,one more thing I have found out that the best way to get them to come in shooting range is to set up in areas where they will only be able to see 75 yds or so.If he can see too far he will fly high circling,or sit off at a distance.I tried the owl thing,but have not had any success with it yet,but I'm sure it works.I tied up some peices of trash bags,and filled them with a little sand.Then threw them into the trees to look like a crow.That worked a little..(until they get close enough to see better).Hope I helped.