For the last two seasons, I've been using a .204 custom built AR. Love it. I just received my 2nd custom built ARand it's in the 243 wssm. cal, but I just got my scope on it and plan to shoot some test loads next weekend. How much I use the .243 wssm. is yet to be determined, but a guy can never have too many guns to choose from. I use several different hand calls, mostly Verminator distress calls, a few customs including some that I have built from cow horn, and I use a Fox Pro FX5 some also. I prefer hand calls, but the ecaller does have its advantages.