If you want the best performance from a slug gun then get a rifled cantilever barrel. Then get a good scope that is designed for the recoil of a shotgun shooting slugs. The scope will cost you as much as the gun and barrel but you should have a gun capable of hitting a deer at 150yds. Now you will have to spend lots of time finding the right slugs for your gun as all barrels shot different. You will also have to practice shooting at the range to be confindent of taking a deer at long range. Good luck.