I've been looking for a Ultra Slug Hunter Compact, SB1-925, 20ga. All I've seen have the regular rifling, I would like to have one with Ultragon rifling. Gun shops say they can order one but can not say what kind of rifling it will have. Should I wait and hope to find one in the future or just get one with the regular rifling ? Is the Ultragon rifling much better ?