Well I picked up I G20 sf today after wanting one for about a decade. It's a gen 3 with fixed sights. I got a box of SIG ammo with it upon purchase. 180gr FMJ 1250fps 624ft-lbs. I first wanted one of these when hogs became abundant in my area. I took it out in the yard and shot 1 mag through it so far. If your thinking this will replace a 44mag you are wrong, will it replace 357mag IMO yes. Recoil is manageable less than a 4 inch SW 357 for sure. I'm going to be testing differnt ammo over the next few months and possibly a red dot optic not sure about that yet. Anyone that has one of these and could tell me which ammo is the best bang for the buck would be appricieated.