Yeah I Colour them with a black marker. All my SRP go in the 223/556 for steel targets. LRP are fouling rounds or sight-in work on new scopes. Same black marker though.Regarding a comment above about a pulled primer not being usable again, I have used pulled primers many times without a problem. I do mark them" pulled use only in non critical applications" in case they misfire.
My Navy Chief shooting friend did that so I followed his lead.
Use your own judgement.
I haven’t had any misfires yet.