How many years old is the plastic in these hulls and they still reload like a dream?
Yes but there are probably STILL some of those bad hulls out there and unless you knew the lot numbers, which is impossible, people should probably use caution. I had 3 do that to me back in'the Day" , Caution is still advised .Have not seen the "breaking off" issue for a long time, there were some early hulls that did, and Remington fixed that issue, it was short lived.
Just because "YOU" never had one separate doesn't mean anything. I have seen at least a dozen do it back around 1980. Remington DID fix the problem but, that didn't change the fact there WERE ( and still may be ) some bad hulls that got out before the problem got solved. As I said caution should be used . Even if the odds were 99-1 There is still somebody who could be that 1%. BTW this wasn't a "burn off" The hulls separated leaving the plastic walls shoved up in the forcing cone,I have loaded both the Green and the Blue and have never hap the burn off.But the Federal White hull GoldMedal burn off quite often and also have had the burn off with old Activ hulls of all three colors. Love to reload those old high quality hulls.