Thanks, guys. You're right about rifled slugs and smooth bore barrels: my 870 (smoothbore, leupold scope, b-square saddle mount) shoots tight groups at 50 yards, but not very tight at 100 yards. Great in the woods, but not on the edge of a field. Want to be fair to the deer, but hate to pass up an otherwise easy 80 yard shot, so thinking of putting a rifled Hastings barrel on my 11-87. Either that, or buy an H&R slug hunter (single shot) for less than the cost of the hastings (or remington) barrel. Thoughts?