How much are you planning on shooting this gun? Do you reload for 28ga? If you aren't set on a 28, there is always the 20ga and you could easily load 3/4 oz shells.
I try to get to a shooting range a few times a month, but i dont reload i would like to start just have not had the chance. I like the 20 gauge and i have 3, a kahn, a stoeger, and some russian single shot my uncle gave me a while back.