What are Puerto Rico's gun laws? I thought they were pretty strict.
I'm certainly no iguana expert, but my opinion is that pretty much anything in the 12fpe class and above would be PLENTY for them.Shot placement and ammo used would have a greater bearing at the close ranges you are talking about..When you go, take some Polymags and some quality wadcutters with you.Sounds like fun, and from what I've read, they make for some very good BBQ.Don't forget you camera, well enjoy the pics.
OK Joe,That's not fair!Now you're just teasing me, and sitting back giggling about it. Lol !
I believe Gamo makes an Iguana Killer sold under that name in Pueto Rico. It is similar to the Gamo Whisper. They are trying to get the population to shoot the things because they are out of control.
Rick Eutsler used a Hatsan Mod 87 in .22 to hunt them.
I prefer 0.25"cal. Even at 16 ft-lbs.Small brain and count on doing a LOT of vertical shooting:http://www.americanairgunhunter.com/iguanahunt.html HTHHector Medina