Avi really gave the Xtrema a dis, which was a mistake. And dismissing 3.5" shells for shooting predators is a mistake too, GC. I'd never buy another 3" shotgun for hunting, not for geese or predators anyway. If you're stuck with a 3" shotgun, I can always shoot your shells, and you can never shoot mine.
When it comes to predators, Dead Coyote 3" ammo has 50 pellets and the 3.5" has 54, only a modest 8% increase. But 3" #4 buckshot has 41 pellets and the 3.5" has 54, a much bigger difference. February 2, at the Preator Master's hunt. 5:15 pm - 44 yards through thick brush with 3.5" #4 buckshot from an Xtrema 2 KO. Two pellets in this old tomcat did him in. Those were two of the pellets that weren't in your 3" shell.
Avi, the original poster, gave little credit to the Xtrema. It wasn't much of a review. He said it didn't fit. At a gun counter, you can't even load and unload, let alone move, mount, and shoot, the true test of fit. Avi also failed to mention that the Xtrema comes with shims for cast and drop and spacers for lop, and with a little work, will fit anyone as well as any factory gun. Even more shims and spacers are available as accessories.
USMC gave the Xtrema its due. It's a great gun, very modern, excellent recoil control, reliability, and weather-proofing. However, mine needed the chamber mouth chamfered slightly to improve feeding. The Xtrema is also hard on the fingers loading and unloading when moving from location to location, like any other pump or auto. It throws the fired shells 12-15' when ejecting, giving away your hide and requiring policing. I especially dislike sending the shells flying when I'm hunting out of a boat. It also came with only a luminous front site, so it really benefited from the addition of a Tru-Glo at the rear. With those minor mods it was a killer right out of the box. On 1/29/07, this yearling female dropped like a rock when hit at 56 yards with Winchester 3.5" lead #4 buckshot using the factory full choke, also covered by brush, one of the season's longer and more challenging shots.
M70 got it right when he brought up a double. He and I are in a real minority. M70 is one of the only others I've seen at this board who even mentions an O/U. When a new 3.5" Browning Cynergy arrived for Christmas this year, I was not disappointed. It too is easily adjustable for drop and lop. It also has a modern recoil pad, and like the Xtrema, a well-fitted camo plastic stock with rubber inlay grips that have a great feel on a cold day. All the metal surfaces are treated and weather-proofed, nitrided, ceramic'd, camo'd, whatever, and it promises to be not easily corroded. Shooting sea ducks with it will be the real test. It doesn't throw empty hulls until I say so, and then they go straight in my pocket. It loads and unloads between predator stands with or without gloves, without fumbling, without hull wear, without noise, and without pinching a finger. Its action is extremely quiet and reliable. The weight of the barrels forward give it smooth swing on both passing geese and running coyotes. And of course, it's got two chokes and two ammunitions at the flick of a switch. It may kick like a mule, and it cost plenty, but at one check-in I pulled it out to show it off and it was the envy of the coyote crowd for sure. An over-and-under has a lot of advantages - if you can afford them. I doubt you'll find it in very many gunshops for inspection either. It's a gentleman's coyote gun and ought to last a lifetime.
This fat 25# female bobcat was a victim of the 3.5" Browning Cynergy during a club competition on 1/20/07. At only 14 yards, all 54 pellets hit the cat. You're looking at the entry side of a shoulder shot. There was hardly any bleeding and no damage to the fur, pinholes in the hide only. Most of the shot hung up under the skin on the far side and did not exit. A shoulder shot like that with any rifle would have ripped off a leg and ruined a hide.
Reloading is fast and easy with a double. Having the Xtrema's third, fourth, or fifth shot is nice but not necessary. I took a lot of doubles, a triple, and even a quad with an older Beretta O/U this year. Most of them came in minutes apart and not all at once. I keep a few extra shells in my pants, my shirt, and my jacket. I reload whenever. This pair of three-year olds came in about an hour after the cat above, a couple of miles away and also fell to the same load of buckshot.
After a little more than a year reading and posting at PM, I have come to believe a lot of guys have shotguns, and may even carry them once in a while on a predator stand (this is, after all, Predator Masters, not Turkey Masters or Range Masters) but very, very few shoot many coyotes with them. Compared to rifle hunting, setting up in tight cover with a shotgun is a completely different game but can be very productive in the right circumstance.