Satern 18" spartan barrel.

[Young]

I currently have the 16" button rifled barrel on my rifle, it performs well but I would like to tighten up the groups a little bit without throwing to much weight on there. Does anyone have any experience with the Satern 18" spartan barrel listed on AA's website? http://www.alexanderarms.com/item/14/142...ndBolt.htm

Also open to suggestions on what people are getting good groups out of in an 18" barrel.