I built a complete custom 20” barrel 223 rifle. I tried to buy all the high end parts, so I could make this the best rifle I could. Once the rifle was finished the gun just wouldn’t group. Factory Hornady, Black hills, and even hand loads were 1.75 to 3” groups at 100 yards. I found a few reviews on this Faxon barrel and I figured I would give shot. Accuracy is greatly improved with this barrel. Shooting my hands loads was slightly less than an inch and I shot some Winchester match ammo and it shot right at an inch as well. Very happy with my purchase and the quality of Faxon barrels. I would definitely recommend this product.