I spent two full days, like ten hours' worth, trying to get good, and while it is a super powerful gun, it's just got absolute trash hitreg, outside of already being difficult to use. For one, its one-hit-down range is way too short. It has two shots before reloading, and unless they're shotgun-one-hit-range, you're done for. Shotguns are just better to use, since they can be fired 6 to 10 times before reloading. Meanwhile, the likelihood you'll land a hit (a hit for me = blood splattering all the fuck everywhere) is pretty low with the BOSG... and then there's the fact that there are three things that'll happen: Either they are instantly downed or killed, when in standard one-shot range for a shotgun, they are more likely to get dropped anywhere from 5 to 50 hp, or the shot doesn't register, they still have full health, and kill you while it takes 5 or more seconds for your character to get around to pulling his finger off the trigger and pull out the secondary.