I just purchased a 591M at a local online gun auction 2 weeks ago. As soon as I was the winning bidder, I tried to find some ammo. I was able to find some Aguila ammo and ordered several boxes. This past weekend I mounted a leupold m-8 4x scope and sighted it in a 50yds. I then moved on to the 100yd target and shot a 5 shot group. I couldn't tell exactly what the group looked like looking through the scope. When I walked to the target I was pleasantly surprised. I did not expect it to shoot as well as it did, especially since the trigger is not very good.

[Linked Image from i.imgur.com]