For a truly customized ammunition, look up Nitro Company in Mountain Grove, Missouri. Nitro Ray handloads some mean shot size combinations in lead and hevi-shot. I have shot them for 3 years now. You pull the trigger and they are dead, no questions asked. I'm getting 240 pellets in a H.S. Strut turkey target at 40 yards with a Browning Gold 10ga, Rhino Choke and 4x5x7 Hevi-shot. Turkeys actually flip backwards when shot with these loads. Absolutely amazing.
WM