PJ, try increasing the heat a bit more. If the food is bonding to the metal, I'm wondering if that means that the oil coat hasn't sufficiently hardened. I went as high as 400 degrees on my cast iron, particularly on the later heating cycles.
Best advice is to get the pan properly hot before doing anything. IMO, an egg isn't the best test for something like this because they're naturally sticky and burn at high temp. Start with stuff that can cop the high heat you need to seal food and prevent sticking. Something with a little bit of fat like bacon, lamb chop, piece of chook, etc is ideal.
I've found Nick's comments about time and additional use to be true. It starts off as passable and then grows over time. Start with the meat and build from there, I reckon.
Best advice is to get the pan properly hot before doing anything. IMO, an egg isn't the best test for something like this because they're naturally sticky and burn at high temp. Start with stuff that can cop the high heat you need to seal food and prevent sticking. Something with a little bit of fat like bacon, lamb chop, piece of chook, etc is ideal.
I've found Nick's comments about time and additional use to be true. It starts off as passable and then grows over time. Start with the meat and build from there, I reckon.