Tut: One of the loads in the 80%+ category was a reload, with which I was quite pleased! The other was the Federal 1 1/4 oz, copper plated, buffered 6's--the so-called 16ga magnum load. Expect the buffering had something to do with the tight pattern. I've found that previously when testing various loads.

On the low end, both were factory loads: Kent's Tungsten Matrix, 1 1/16 oz 5's, and Rem Express 1 1/8 oz 5's. Interestingly, Kent's Tungsten Matrix 1 1/4 oz 5's did much better, at 74%.