This is somewhat dependent on the range in which you will shoot your turkey. What are your choke(s)? I find that my "standard" upland load patterns great when I change the shot size to #5. I always put 7 BB's on top of the #5 shot. Just a ritual with no real need - but I often find one of the BBs in the turkey. I am loading a square 1 1/8-ounce load, hard card over powder, olive oil soaked 1/2 in. fiber was, shot and two over-shot thin cards. In the left barrel the pattern is good on turkey to 35-yards. The right barrel shortens the distance to about 28-yards. Every one of my Pedersoli shotguns is slightly different with loads, so you really have to experiment and pattern yours.