#4 steel comparisons don't mean much to hunters who normally use much larger size steel shot, not just for geese, but for ducks. My experience with #2 and #BB in 1 3/4 ounce 3 1/2" ten gauge loads and tight chokes has taught me that I am not working under much if any handicap compared to lead or expensive no tox loads in 12 gauge guns. My "lifetime" supply of 1 3/4 ounce steel ten gauge shells is all I have used for years for waterfowl. My initial investment was about $5.00 a box of 25 on closeout many years ago.