I have had mine a couple of weeks now and I am still mastering it,saying that, I have had a few with it and I am getting better I think at the moment its in part somethng to do with the time of year,another month and they will start pairing up,I think thats when it will come into its own mate,
Yeah I've only just started up but I've not had a massive hit of birds yet really, my friend says the same as you that hopefully the calls should come into their own once they start getting together for nesting. Going to order myself a primos now and see how we get on, appeciate the post(s).