I don't agree entirely with you, but I do think that some Hand Cannons should have their effective range adjusted. I've come across several players using Thorn and Hawkmoon as a sniper. I have tried it personally with Hawkmoon, and was able to land 2 to 3 consecutive head shots at very long range. In Thorn's case, this makes it feel over powered because of the poison damage, but I don't think that it is so. I've come up against it at closer ranges with several weapons and what dictated the outcome was my skill versus my opponent's skill.