Ammo Caliber: 12 gauge - Shell Length: 3 inch - Shot Weight: 1 5/8 OZ / 711 Grain - Shot Size: 4 - Muzzle Velocity: 1350 ft/sec - Rounds per Box: 25 - Boxes per Case: 10
Fed Fs: This likely refers to "Federal Premium Ammunition," a well-known ammunition manufacturer.
Lead 12ga: This indicates the type and gauge of the shotgun shell. It's a 12-gauge shotgun shell, and it's made of lead. Lead shot is commonly used in shotgun shells for various purposes.
3 Max: This indicates the shell length. In this case, it's a 3-inch shotgun shell. Shotgun shells come in various lengths, and 3 inches is a common length for 12-gauge shells.
1-5/8oz: This is the weight of the shot payload in the shell. In this case, it's 1-5/8 ounces (or 1.625 ounces) of lead shot. The weight of the shot can vary depending on the intended use.
#6: This indicates the shot size. In this case, it's shot size #6. Shot sizes range from smaller numbers (e.g., #9) to larger numbers (e.g., #00) for various purposes. Shot size #6 is often used for hunting game birds like pheasants and quail.
25/10: This likely represents the quantity and packaging of the shells. It's common for shotgun shells to be sold in boxes of 25 rounds. The "10" could potentially refer to the number of boxes in a case if you were buying in bulk.