I have a Mossberg 835 w/primos Tight wad choke. I tried 4 loads.
Win. Supreme 3in #5 and Remington #5 Hevi-Shot, Remington Mag #6 Copper Plated lead and last but not least, Remington Nitro Turkey Hard lead.

1st place would be Remington Hevi-Shot 3in #5 ( at a hevi-price

2nd went to ... beleive it or not $4.99 a box Remington NitroTurkey Lead.
@ 35 yrds. Consistant 20 pellet count in the vitals.
@40 yrds. Consistant 11 pellet count in the vitals.

Not going to get that 45 yard great pattern as with some hevi-shot loads, but for 4.99 a box and 20 pellets @ 35 yard + not a bad 40 yard shot. Id try Nitro Turkey.