I have used 8's on the past for trap out past 50 yards, but my current loads use 1oz of #7.5. The #8s seemed to work just fine. I was using 7/8oz of #8s and when I went to #7.5 I also jumped up to a full ounce to maintain pellet count. I went up a size when I started shooting all the way back at the 27yd line in hopes of retaining a little extra oomph at impact 50 some yards away. I must also note that I shoot lower velocity loads, around 1085fps, to lower recoil a bit. 1200fps would offset the smaller shot size.