If you can get good patterns with 4's than use them I use both 4's and 5's and my patterns are plenty dense over 150 in a 10 inch at 40 which makes me happy enough. Not near as dense as that #7 handloaded hevi but my pellets are hitting harder and I save money to buy calls which I'd rather spend the money on. Hevi shot hits as hard as one shot size of lead bigger at most. No way that 7's are hitting like 5's. I've read enough reports of people weighing the stuff to know the difference ain't that big.