Yep, chucks can be pretty nervous! They're also big enough to not require as much precision as smaller rodents.
The A17 ammo shoots to exactly the same place at 100 yards in my rifle as the standard, and last week a friend and I tried some I had on hand in his Ruger while shooting prairie dogs and it did the same. He soon found, however, that it was noticeably flatter at longer ranges.
