Sabotloader,
Nice pics and good information. I'm sure that happens on some T/C barrels for whatever reason. I can also see where that would possibly create issues with lead conicals. Lead bullets deform very easy. Some people deform them loading them not knowing it and get horrible accuracy. If someone finds me a QLA miss lined that shoots Moa with sabots I'll show them I will shoot bore size bullets accurately. Your not going to deform thors, powerbelts, Lehighs, or the Parker bore size bullets I have for example.