Hi Max, I think the tiny reamer is the best option, it is nice and sharp and I can control it easily in a small chuck and give it a couple of turns with a bit of pressure on it. It pulls out small shaving of brass. I don't think there is much between the different suppliers they all seem as bad as each other, they are all coming out of the same factory. I would like to do another half dozen just to see if this is the answer
