Have you guys tried the Aguila Colibri? I had a couple possum that were causing hell several years ago in the alley. Living where I was at I decided to try them. At the time I had one of the cheap Romanian trainers that had the leaf rear sights set up for 25, 50, and 75 yds. At 25 yds the 75 sight was used and dead on. The Colibri did just fine on the possums too.