I have an old Weaver 2.5X that I've been using on rimfires, but it seems to work well enough with the 77/357. I've only put a couple of different .38 Special loads through it at 50 yards so far.
Aside: the rings that were shipped with this rifle were rusted on the bottom. Pretty shoddy quality control, IMO.
Aside: the rings that were shipped with this rifle were rusted on the bottom. Pretty shoddy quality control, IMO.