RIO Ammunition Field .410 ga 2 1/2in MAX 1/2 oz Size 7.5 1200 fps - 25/box. These game loads come in 16-gauge 28-gauge and .410 bore sizes to suit your particular weapon. They measure 2_ or 3 inches in length and deliver an impressive muzzle velocity of up to 1300 feet per second. If you are in the market for a heavy-duty and reliable game load look no further than the Rio Heavy Field line of sub-gauge game loads. These game loads are packed with up to 1 1/8 ounces of #6 7 8 or 9 shot to ensure tight shot patterns each and every time. Specifications for RIO Ammunition Field .410 ga 2 1/2in MAX 1/2 oz Size 7.5 1200 fps: Manufacturer: RIO Ammunition Gauge: .410 Number of Rounds: 25 Shot Size: 7.5 Shell Length: 2 1/2 in Muzzle Velocity: 1200 ft/s Application: Field Shotgun Shot Weight: 1/2 oz Package Contents: RIO Ammunition Field .410 ga 2 1/2in MAX 1/2 oz Size 7.5 1200 fps What is RIO Ammunition Field .410 ga 2 1/2in MAX 1/2 oz Size 7.5 1200 fps good for? The manufacturer says that it is best for field.RIO Ammunition RC3675: Field .410 ga 2 1/2in MAX 1/2 oz Size 7.5 1200 fps - 25/box