Las Vegas Mass Shooting

[DJC]

Thanks DJC. The reason that a belt-fed weapon theory was propagated was not regarding rate of fire but the duration of some of the bursts of fire, which the article claimed were too long in respect of the magazine capacity of a modified rifle. From memory, and I'd have to go back and check, the author claimed to be an ex US marine?

That explains it 

100 round magazines are pretty common in the USA, not that I saw any on the weapons photographed in the shooter's room.  There did seem to be several rifles with bipods and I suspect that he was changing rifles rather than changing magazines - that may knock a second or two off resuming fire when a magazine empties.

I read that they found a paper on which the shooter had calculated the trajectory from his position to the ground.  He seems to have been determined to cause as much harm as possible.  As I alluded to previously, it could have been much worse if he had used a more systematic fire plan.