Well if you do a bit of googling on hemochromatosis you will find lots of info. Just over 1% of irish people have the full version of the disease and I think 10% have at least one copy of the faulty gene.
My uncle has the full version of the disease and that prompted me to get tested. NHS did a genetic test and found I have one copy of the faulty gene.
Strictly speaking with only one copy of the faulty gene iron should stay normal, but in my case my iron is well above normal but doesn't seem to get so high that it will cause severe organ damage.
Without going through my medical records, I can't give you all the numbers and I can't remember if the serum iron, or the transferritin test is the most relevant. All I can remember is that for one of these tests the normal range is 30-300. My numbers range from 400-600. I did have phlebotomy which brought it down, but found going to hospital once every couple of months quite inconvenient. I decided to stop treatment and it has stayed in the 400-600 range for the last 10 years. I believe that as long as it stays below 1000 it is not doing too much damage, so I'm just keeping an eye on it.
Apparently not all GPs are aware of the disease. I think if there is high iron and Irish ancestry, hemochromatosis is very likely.