I'm wondering what exactly they did to the Encore barrel? Maybe used a water based cleaner? Accurate says that's a no no... We've shot probably 10 lbs or more of the stuff in Carol's rifle and I've seen no rust. It did get a bit of white fuzz on that deep recessed crown once, but nothing as far as rust. Now if I can just figure out why it tends to throw patched bullets about 10 ft to the right of grease grooves...