Sounds like a "Head Spacing and Timing problem" to me................and I am not referring to the guns. >
Depending on their years of Service, and which wpns they used, combined with their overall knowledge, experience and expertise with the wpns can have an indication of what kind of comments they may put forward. Lack of experience and knowledge of any weapon can have an (poor) operator make comments derogatory towards that weapon.
The M2 was a very effective weapon when properly maintained, Head Spaced, Timed and lubricated. If not, then it could be a very dangerous piece of kit for the operator. The .50 Cal QB was a totally different experience and offered different problems for the inexperienced. In the end, it was the operator (experience, knowledge, etc.), not the MG, that was most often the problem.
