I was reading it the other day. June 04 issue, page 62. Article was about shotgun loads. Caption reads
At 50 yards the Federal lead pellet load yielded denser pattern than its Remington Hevishot counterpart
but if you look closely at the pic you can see some info written on each target. The hevishot was 1 1/2 oz #5 shot with a modified choke. the federal was 1 3/4oz #5 shot with a x-full choke. Of course the Federal was denser, it had an extra half oz of shot which means more pellets plus it was fired from a tighter choke.