I used to use the old federal premium tungsten iron shells i got for like 10 bucks a box 2s and 4s out of a Modified choke kill birds left and right, now that i am out of them i shoot Winchester Xpert HV 3in 3s out of a Skeet choke and drop birds, i tried black clouds and a box later got 2 birds , every time i would watch feathers fly and nothing would fall or even glide, but my uncle shot a snow about 80yds up and it fell like a stone so i might pick up some 3s and give them another try now that i got a skeet choke.