I came across this video while searching for historical gunmaking footage. I believe it is Osa Johnson on a hunt and thought you all might like it.

http://www.criticalpast.com/video/656750...ad-rhinoceroses

While we're at it, you will probably find these quite interesting as well.

Workers packing rifles (Enfields?).
http://www.criticalpast.com/video/656750...dipped-in-water

Workers testing rifles (Enfields also?)
http://www.criticalpast.com/video/656750...rgets-on-ground

Manufacturing and Assembly
http://www.criticalpast.com/video/656750..._guns-assembled

Search around a bit and you will see other related videos, including Browning BAR manufacturing and more.