I have the Pro Carry in alloy and in steel frames. I notice a big difference between the two. The alloy tends to twist more in my hand and the recoil impulse is sharper. After 100 rounds with each gun I can feel the difference -- it's more tiring to shoot the alloy frame. There is a weight difference, but it seems less noticeable because of the weight of a loaded .45 mag. Some of the perception of weight changes if you use a good quality holster. The bottom line is that if you plan to shoot a lot you're better off with the steel frame. Even if the alloy frame holds up for 20k+ rounds the slide to frame fit will get sloppier faster.