https://ammoyard.com/shotgun-ammo/federal-prairie-storm-fs-lead-12ga-3-1350fps-1-5-8oz-6-25rd-per-box/. I know it's pricey, but if you need it, you need it. They also have it in #4. I bought a box about 5 years ago at Cabela's that I use as an anchor shot on late season birds and still have...