Yeah I can see the difference even on the outer diameter. The cylinder walls are really easy to see the difference. I was curious. I have a .44 mag S&W29 (an older one with recessed cylinders) so I can shoot it if I want to feel the recoil. From what I understand the .44 SPL is really fun with moderate loads and 200 gr bullets. And I have a Rossi .44 mag cowboy rifle that will shoot the 44 spls so all I need now is a good horse under me and some wide open spaces. (oh I got the hat too!)