I' ve been reloading shotgun shells for quit a while, and I' d like to offer one suggestion. If you are loading 2 3/4 shells, go with a Winchester AA hull, no matter what you' re loading for. I' ve found that the hi-brass shells make almost no difference and the AA' s are a much better hull to reload. A lot of the hunting hulls are a cheaper hull with pieces (like the base-wad) that will fall apart, even after being shot once. Like others have said, make sure you use loading info for the specific hull you reload as factors such as plastic vs. paper base wads will make a big difference in capacities and pressures.
Best of luck!