A friend of mine gave me several magblend shells after he tried them in his 20ga 1187,he didn't like them all that much and told me I could have them if I wanted them.
I tried them in my 870 with a .570 Tightwad choke and they turned out to be a great combo, my laptop crashed a month or so ago, but as soon as I can I will try to find some of the pattern pic's