I'd be more concerned with how the gun fits you than the choke, if it is a gun you wish to pursue. I didn't learn about gun fit until I was already on my third of fourth shotgun. Some shoot better than others for me but most of mine are choked modified. It seems most old guns are choked mod or full, I've read they needed tighter chokes back in the day because of the paper shells. IM would make for a nice late season gun when birds are runnin and flushing further out.
