My "Ol Precious" 870 does not appreciate Blackclouds in the least. Jam, jam, jam. It's favorite is Fed Premium, but it doesn't mind Xperts and is happy with either 2 3/4" or 3". Have used Kents, and Ol Precious was not really impressed but will submit to occasional chambering of them. For ducks we use #2 for geese BB.