Any time you shove something into your body and tear muscle fibers as well as tissue, it devolpes scar tissue. Look at your leg, ever get a cut and peel the scab to quick. Now your left with a scar. Same thing is hapening when you pierce your body. Scar tissue is building up inside. The bigger the gauge the bigger the hole and the more scar tissue you get. Scar tissue never grows anymore ll it does is sit there and become scar tissue. ALways use the smallest gauge possible. It is not about I am a big man I cna use 18g pins. It is the fact that if you are planning on shooting alot then over time you are going to be nothing but a big scar inside.