Hello Jippofin,
surely I don't have an MG.34 in my backyard, but I am not completely naive either.
Put aside today's videos (we don't know how the rounds were charged, these might have been "soft" charges) here is at 0:26 a burst of maybe 10-15 bullets:
Sabaton - Stalingrad + Lyrics - YouTube
Is the barrel thrown upwards and the bipod jumping upwards? No, it is not...
A 120 cm spread at 200m would be fine, but I am not talking about spread, I am talking of a systematic error, bullets going high as much as they . I estimate that in Ro2 2nd -3d bullets are already going 2-3m high of the target at 200m, this gets always worse. Try a 2 sec burts, it gets ridiculous... the gun is completely lifted upwards, the bipod does not reat anymore on the surface.
The problem is that for MGs, TWI has used the same recoil model of rifles. But MGs were designed a different way than rifles: they were designed so that the barrel of the gun is aligned to the butt. This gives almost no upwards component of recoil.
Here are some pictures, where I have shown with a red line the alignment between barrel and butt. For MGs barrel and butt are very well aligned (much more for MG-34 than DP-28), for rifles and SMGs they are not aligned (hence the upward recoil for rifles and SMGs). I cannot make it any simpler than that.
LMG:
SMG:
LMG:
Rifle:
BTW, how many historical videos of MG34 being fired single-shot are there, and how many beng fired in burts?
Maraz