A shotgun with no recoil
I haven't seen the full movie yet, only the previews in the theater a month ago. There is one scene where Bathsheba shoots a shotgun. When she fires, there is absolutely no recoil. Even with smaller caliber shotguns and any rifle bigger than a 22, there is a noticeable recoil.
I recently watched Wild Things and noticed the same thing when Denise Richard's character is shooting trap. She fires twice in succession with a 12 gage and no recoil.
Checkout videos on youtube and you will see what I mean. The special effects people can do better. And if they can, the actors should be able to create the effect.