i just set up my nef 10, see the post about nef rem hevi shot patterns, if you are going to shoot hevi shot you will need a better choke, a jellyhead, puregold or an indian creek all work well
if you want to shoot hevi shot the only loads are special order nitros which are the best buy pricey, hevi 13 makes a load of 5's that pattern well but do not put up as big of numbers, federal makes a heavyweight shell in 7's,6's and 5's they are good big are very finicky and expensive when compared to hevi 13 but no as expensive as nitros, if you have the money are are not in a hurry go with nitros, but hevi 13 is supposedly coming out with a magnum blend shell this fall of 5,6,7's and it should be beast of a shell, so if you dont plan of turkey hunting with it this spring that may be an option to wait
it all depends on how much money you would like to spend, if you get the right choke and some nitros you will have a 10ga gun that no 12ga will even come close to touching, feel free to message me with any questions