I have what used to be a Sendero w/ a laminated stock. I had it worked on by a friend of mine and am getting great groups. Its a chrome moly barrel and am wondering how many rounds would the barrel be good for? The load that I will be shooting will be a 180 gr. Accubond at around 3440 fps. The caliber is a .300 RUM. Its definitely a hot load but am getting around 1/2 moa out of it.