I agree about different chokes for different size shot and different brands of shells, our local American Legion has turkey shoots and I've patterned all my shotguns with multiple chokes, I like the extended chokes (I feel the extra length equals less angle). I have a custom choke 8" long and .635 that throws a nice pattern at 20yrds but not at 50. I've used Carlson, Primus and Truglo and have had good results from each.
Also I found that polishing the forcing cone helps, I had a machineist student help knock the angle down then I polished them using a 2 shoe brake hone, steel wool and a cleaning mop with polishing compound.