I have a crio choked benelli also. Have had great patterns with a Sumtoy .650 and various loads. It shines with standard lead ammo and shoots hevi shot well also. I do think something in the .650-.660 are real good in the benelli. Check out the benelli pattern pick section, lots of useful info on it. I have a .665 gobbling thunder i have tried in my Vinci with 3" ammo, it puts up really even patterns, but it is pretty thin at 40 yrds with conventional lead ammo. It shoots the win longbeards well though. If i were to get the Gobbling thunder i would try the .655-.660 for lead ammo before the .665, at least in a benelli crio.