I have a wadwizard that came with the fun but id rather have a rhino there both in the 100$ range so I figured fair trade I like a .695 or tighter but would take a. 720. The wadwizard doesn't technically have a constriction it has Russ inside it that grab or pinch the wad. You'd have to read their website. You can aslo fire steel shot in it even #T buckshot etc versatile choke