Money is tight, and I'm considering getting a used 12 gauge Remington 870. It's an older one, no screw-in chokes. The guy at the gun shop checked the barrel and said it measured either improved cylinder or modified/improved, I forget. What type of slugs do you recommend for hunting deer? Remington says their Buckhammer is designed for rifled barrels. Do they work in smooth barrels too? Also, the barrel has just a plain old bead at the end, not rifle sights. Can I expect to get any type of accuracy with this, or should I just buy a seperate barrel for shooting slugs?