I bought a couple of packs of CCI shotshells for my 4" .44 Mag just to carry when scouting at the deer camp in case of running up on rattlesnakes. When reading the info on the back of the pack, it states not to use them in a gun with a ported muzzle. Well, my guns muzzle is ported, but I also have a 2" unported .44. I guess that is the one I will carry. I think I know the reason why, but would someone who really knows tell me why I shouldn't shoot them in the ported mag?