I have bought a lot of Mag-Na-Port RCA guns over the years and I do love them all . BUT a 4.5 inch barrel with the porting is just plain stupid . I guess I buy the guns because I like them but I will not shoot them much if at all . After shooting only Ruger Super Blackhawks for over 50 years it is the perfect Revolver . I load 240 gr. coated lead with 10.2gr. with Unique and like that a bunch . (Shot 14lb. Unique last year) I also load 240gr, jacketed with Win 296 and like them hot . . In all this time never thought porting made any since .