I live up against the foothills on a large plain, running 50w on 2m into a Diamond X30a mounted in my attic a friend of mine and I can simplex with about 75-80% readability from house to house, as the crow flies we are about 15-20 miles away from each other. Without repeaters the 15-300 miles range is hard range to get reliably, unless you are running tons of power. My home station in between 5-50 watts on 2m/440, 5-25 watts on 220, 10/50 watts Trbo (DMR) and my HF rig is 50/100 watts. Not saying it impossible, its just hard range to nail. NVIS??