If you use a Foster or Brenneke type slug, you will be fine with a full choke. Those "fins" on those slugs are actually there to allow the slug to squeeze down to a full choke size, not to, which most people assume, give spin to the slug!
It also really depends on what your gun likes......some slugs may shoot fine though a Full choke, others may like a more open choke......you really need to experiment with your own firearm/slug/choke combo to see what works the best!
+1. I have seen a number references that modified is considered the most accurate choke with Foster slugs, but that will depend on each gun's preferences.
Mark




























