I like seeing the colors and big "IC" and "M" to know which choke I'm using. I have to often change between shooting IC/M on 16-30 yard stations and using M/IM on 25-45 yard stations. Sometimes I even run a weird SK/M on stations that throw targets in front of your face, then a bunker trap on report. I don't have time to look at notch codes that don't even protrude from the barrel.