I do in fact own one, in the same caliber in fact and have had some nice results but I'm looking to push it further so I posted some questions that have yet to be answered. In return, where specifically were you looking to get that barrel from?
Anyone know more details about the H&R Ultra Varmint Fluted 223 Rem. (SB2-F23 ) Model
I have yet to recieve a result from my inquires, and as a matter of face a .308 barrel on this rifle would be and interesting alternative to a new build ....so your question is just as interesting as the one that I originally posted so I have an itch to find the answer to them both.