I have a mini 30 but for what it's worth my only notable expierience with tracer rounds is that they fall considerably short of your zero after using regular rounds. so, serious hold-over is neccessary. they're expensive suckers so I space them out in the clip - one every other round. they're fun, but unless your in some kind of night time fire fight - which chances are you won't be - given that they're pretty much a waste - fun for a while though. fun to shoot up in the air like fireworks.