I'm sure this subject has been talked to death but I didn't need to pay attention until now. I find myself with 3-400 rounds of 9mm LRN ammunition and 2 Glocks and a Smith 59 to shoot them in. What is the reason for not shooting lead in Glocks? If I do shoot, say, 400 rounds through them should I use lead remover to clean them every hundred rounds or so? What's the best procedure?