Re: Model 70
for what its worth; Iron Brigade Armory aka: Norm Chandler rifles, has used Hart barrels for quite sometime... I'm not sure, but I think they do most the barrel and action fitting for IBA at Hart now... Anyway, I've had a couple of Hart's barrels, which shoot fine, but I’ve never had any work done by them. I have a former Marine Sniper buddy I hunt & shoot with’…., that has one of the early IBA rifles with a Hart barrel, in 7X61 S&H….. at 1k it's amazing.