I guess some people will always find a way to try and cheat! I never was one for checking shells and only saw it done twice in 44 years of trap shooting,but, this one makes me wonder! lately,there have been stories of some people putting SPENT primers in reloaded shells. The spent primers are painted with bright orange model airplane paint the are supposed to "in theory anyway", to look like a target chip if the shooter misses. Sounds pretty desperate to me,but, I guess almost "anything" is possible!!!