I have been hunting with a slug gun for 10 years and they have really come a long way in that time as far as performance and accuracy. One thing is for sure, you will not want to shoot a lot at one timewhen sighting your gun in. A slug gun, mine anyway, has a lot of recoil and will take control of your shooting habits after your first box of shells. There has been some very good advice posted, such as starting out at 50 yards. When doing so make sure your target is large enough that you will see where your first shot hits or at least have a spotter. 150 yards is a heck of a long shot for a slug gun, however it is attainable with consistent practice. Make sure you have a quality scope as it will take some punishment, and around here (IN)there are very few hunters who use such a high powered scope for a slug gun. A slug I have had had great success with is the Brenekke slug. Good luck.