I run the code black duck and goose for waterfowl in 3 dif guns.  I also have the anaconda long rangel for my SBE II that shoots extremely tight with 2 steel and under and heavy trap loads.  All give excellent,  even patterns. My buddy Todd picked up a CB turkey for his SBE II and shot probably 5 dif rounds through it.  While even, it didn't give a hotter core that we both like.  I lent him an original jellyhead,  a Trulock and a Carlson's Longbeard.   They ALL patterned better with every load but the Longbeard shined with 3" 6s and 5s.  Very dense, even patterns.