Poor accuracy - Spikes Tactical 5.56 Special Purpose 18in Medium Profile Rifle Barrel

After significant testing with factory match and hand loaded ammunition, the barrel would not perform as expected - the best it did was ~2" at 100yd, with most 5-shot groups exceeding that by a significant amount (3-4"). The tech at Spikes was helpful, but this barrel is a lemon...a large waste of money and time.