First it has a short magazine, so you're not wasting a thousand expensive .50 cal rounds before you have to reload.
It was also originally designed as a heavy machiengun, the French's answer to the Bickers, and Spandou, (not sure if I spelled that right) but could be used as a light machingun. Because of this the Chauchat is a big and bulky weapon that weighs half a ton (hyperbole) but can dish out a lot of damage.
Laslty the Chauchat has a very slow rate of fire. It could function just as well as a semi-automatic weapon, somehting that fired maybe two shots per second or less.
All in all it would be a continuation of what the BAR (automatic rifle) is in comparison to other machinguns. Going for power and range, over a wall of lead.
