I've noticed a lot of players complaining about weapons doing erratic damage. While rumors have been tossed around such as 'weapons do more damage to hotter mechs', 'missiles do more damage to internals', 'ect'....
The real underlying issue is latency. Every match there's only 2 to 3 people under 50 ping with the rest in the 250s which is just enough difference to matter imo.
Being a LBP myself I constantly check the board to see who my real competition will be for the round. (aka the other low ping bastar*s) Latency is a two fold problem for MWO. First of all you have to deal with leading your target forcing players to learn how to aim with their arms, then there's the phantom misses everyone complains about, last but not least the one thing even pros are seeming to forget is BURST damage. Latency can make ordinary fire register in clumps this creating artificial burst damage.
While I can't fix everyone's latency for them, I can help them become more aware of it so in the future they will learn to play upon their strengths and weaknesses with more effectiveness.
Good piloting out there.