I was looking at carlton choke tube chart. i see different guns have different sizes for the same name like ic-m-f . one may list a lm as the same size as another f . if this is true does that mean all mod shoot the same patern or does it mean all .725 "s shoot the same patern? if it goes by mesurement like i think it would be, then when your budy puts in a mod. tube on his browning , you may be puting in a skeet in your breata , or something like that. any idea?