Magazine ID Question

[TXCOWDOC]

I'm looking for a system to identify my AI magazines for my Rem 700 LTR to distinguish between full power loads and my subsonics. My loads look the same externally (just change powder). Curious as to what works for some of you. Colored tape? Any advice is appreciated.

THANK YOU-
TX COWDOC

 

[DAVETOOLEY]

Magic marker on the ogive

 

[MarinePMI]

Colored sharpie over the primers...