I have one in 18in and my son has one in 20in. They have shot very well. My son took his 2 days after he built it and shot a rock squirrel at 300yds with it with a 15mph cross wind. I have been able to take it out to 500yds ringing steel all the way. The are very good barrels and have 2 more Odin barrels for 223 that will be built later this month. Right now I am just shooting factory loaded 123gr Amax.