Too soon to rattle

[kt]

Say guys when can i start to use rattling even if just a little to my advantage, never really called deer but last year a few friends had crazy action with the primos rattle bag i know of 20 + five to seven pointers that walked under stands to see what was what and an 8 and a 10 that bit the dust because they came to horns, so i know these guys in my woods are going to get to the horns eventually i just want the jump on them, at what point can they be good. right now temps are almost spring like and the woods are more like a jungle of undergrowth. curious
kt