mossberg 500 with slug barrel and scope. i just got the barrel and scope at the end of the season last year. i sighted it in and waited for this year. i took the gun out friday for the first time with the barrel and scope. i got a doe with it. i can't wait till 6 day.
Depends on the situation.
For thick woods and foul weather I have an old beater Mossberg with iron sights. This ol' Mossberg has killed at least 25 deer. It looks like [no swearing please] but it is deadly accurate[up]
For open fileds and open hardwoods I use a custom made New England Arms single shot slug gun with a 2x7x33 Luepold scope. It is a Tack driver.
I also have a Belgium made Browning 12 ga. Autoloader that I have never taken out as I am afraind I would scratch it (It is stupid I know) but the gun is worth a bit of money and was given to me by my Uncle who passed away so it means a lot to me.
*Slug guns MUST be zeroed (sighted-in) while the slug is supersonic (above 1220 ft/sec in velocity). Therefore you must zero your gun 2 inches high at 50 yards, absolutely centered above your point of aim. You will then be dead-on zeroed at 100 yards because gravity will see to it. Zeroing at 50 yards also cuts down (by approximately 60%) your chance of adjusting windage error into your scope setting.