I want to get a shotty I can use as a defender for bears so take slugs and buck shots, but it can double as a hunting gun with some chokes, what do you guys think could fit this?
The two most commonly suggested shotguns for defensive work are the Mossberg 500 and the Remington 870. A good example of either gun is reliable and resistant to damage from hard use. These guns have the advantage of a large selection of additional barrels available from either the manufacturer or from after market sources. I like the idea of screw in chokes as they make the barrel thicker near the muzzle, or extend slightly beyond the muzzle, and protect it from dings if the barrel bumps a rock or other hard object.
I would stay with a smooth bore gun rather than choosing a rifled barrel, and I would not choose a barrel so short that it reduced the length of your magazine. While a bear problem is most likely going to be solved with one or two shots, more ammo in the gun is comforting. On the flip side of that coin, I would not choose a gun with a long extended magazine. I didn't always think that way, so I carry a Mossberg 590 that is heavier and slower to use than would be optimal. Five rounds in the magazine is about right, and if a one round adaptor is necessary to achieve that, they are available for the 870. There are features on the Mossberg I prefer to the Remington, such as the position of the action release, and the fact that the ejector, and cartridge stops are not riveted in place.
Pump guns are only one option though, and the semi-auto for many people is a better choice. Gas guns and recoil operated guns have the advantage of self cycling, so when you are shooting under stress, there is no chance that you will short stroke the gun, which effectively takes it out of action as the round that is released from the magazine and is on the elevator is blocked by the fired shell that has failed to eject. Additionally, the semi-auto has a rigid forend which provides a more stable platform compared to the wobbly forend if you can sling up for the shot. There is no reliability advantage of one action over the other, beyond the fact that the semi-auto is not dependent on the shooter to cycle. If there is a disadvantage it is that the action must be manually operated if you need to select load less lethal ammunition. The Remington 1100/11-87s are reliable guns, but if your pockets are deeper you might prefer a Benelli, which seems to be the stylish choice at the moment. A pal of mine recently bought an M-2, and it appears to be a well made, light weight, handy shotgun that will lend itself to bear work quite nicely.
Which ever gun is chosen, beyond marksmanship, reloading and "slug select" are essential skills to master. There may come times when the slug you have in the chamber is not prudent for the conditions and you have to switch to buckshot or vise-versa. There maybe times when using a lethal ammunition is not necessary or prudent and you wish to load a less-lethal round. Switching loads in mid-action has come to be known as "slug-select." LEO shotguns normally have a buckshot round loaded in the chamber under normal use, but when a specific threat requires the shooter switch to a single projectile, he must eject the shot cartridge and load the slug, and the intricacies of each type of action determines the best way of accomplishing this. In the wilderness, the situation is opposite to that of LEOs. Your gun would normally be loaded with slugs and you would have to "select" shot or "select" a less-lethal round to solve your specific problem if the use of a slug was inappropriate.
Which ever gun you choose, it must be 100% reliable and any failure must be addressed before you can again depend upon that gun. I prefer to have a shorter than normal LOP on my defensive guns. This is so that when I am wearing warm bulky clothing the butt doesn't get hung up as I shoulder it. Besides, most folks can manage to shoot short stocked guns easier than they can ones that are too long, and a stock that is too long magnifies the feel of recoil in addition to making the gun slower to use.
Because the defensive bear gun is most often going to be shot with slugs, rifle sights are a valuable feature of your shotgun. In fact you should view the shotgun as less like a fowling piece and more like a powerful short range rifle. A ghost ring and post sight is the fastest sighting system available to us at this time. It is faster than a plain bead which requires you to carefully position the bead on the top center of the receiver, and it is faster than open sights which require you to shift your focus between two sights at different distances from your eye. The ghost ring allows you to see the post in the center of the aperture without looking at the ring so all you have to do it place the post on the target, pull your focus back to the post and press the trigger. Speaking of sights and visibility, a flashlight that is attached to the shotgun allows you to make rapid target acquisition in the dark.
Wow, how many of these threads do we need, 75% of the threads on this forum in the past 2 years have been about people scared of bears and stupid cut off garbage guns.
Carry the gun you would normally hunt with and don't be an idiot.
If folks are going to carry guns for defense purposes, they might as well get good information to base their choices on. Simply referring to all short shotguns as garbage guns or suggesting that they simply carry the guns they normally hunt with does not supply them with good or even useful information. If folks are tired of bear defense threads, or simply don't like them, then perhaps they just shouldn't post on them. As for me, I find self defensive one of the more interesting aspects of gun ownership, and as a group, unrestricted gun ownership should be the goal for each of us. There are no good guns or bad guns, as guns have no will of their own; but some guns are more useful under some circumstances than others, and some gun accessories are more useful in some circumstances than others. Spending money helps make our little world go round, and the bigger the part that guns play in the economy, the louder our voices will be.