Hello everyone. Great board! I am new to deer hunting and can hardly wait for my first adventure. I am going out with my uncle and his friends and they are going to put me on a good stand where they have shot a couple of deer each year. I am psyched. I have went out small game hunting and duck/pheasant earlier this year and I am gettng to be a pretty decent shot. My question:

I own a Remington 870 Wingmaster 12 gauge.It shoots 2 3/4 shells. I do not have a slug barrel for it and will not be able to afford one for this year. What kind of slugs can I shoot out of this gun? On the side of the barrel it says "Full". I assume that means choke. There are no places at the end of the barrel to screw in anything so I guess it is just a regular barrel. Any recommendations? I can go out and buy some slugs and target shoot, I just don't know where to start or what I should stay away from. What kind of "Off Target", "Away From Center" can I expect with a slug coming out of this barrel.
Any help with this would be great.Thank you very much in advance.