FWIW and moving in the opposite direction of use,
I have a .45 Wolverine, think it was just over $100 online. I was considering a high power .45 PCP air rifle when I came across the Knight on sale. Since it cost 10X less than the PCP, totally outclassed the air gun's ballistics, still had "variable power settings", and my intended purpose was yard and garden pest/varmint control, I decided to try the Wolverine.
I started testing PRBs and very light loads (15-30 grnsV Pyrodex) trying to approximate the high-power setting on the PCP. With 209 primers 'groups' were hand size at 20 yards. After several tries with RBs and FPJs, I switched to #11 cap ignition. Twenty-five yard groups became a single hole and I'm comfortable with PRBs out to 50 yards. It has a very low sound level for a firearm too.