I didn't care for the first generation of Sigmas and sold mine off. Now the new ones feel much better. The trigger feels vastly improved. I question why they felt the need to change the magazine size though. But mine has no issues with my cast SWC bullets and has been nothing but reliable once I got the amount of powder dialed in from working the load up to match the gun. It was affordable and got me back into a .40SW gun without cutting my wallet in half. I do like the built in options on the SD more though and I really wish they would just merge the design of the two.