As to Kalinin several divisions came from the Northwest Front, meaning they didn't come from Moscow and wouldn't have traveled via Moscow. So when they detrain in Kalinin ITTL instead of outside the city
Minor nitpick, but according to Sharp/Radey, it doesn't seem as if they moved by train.
Not even Russian wikipedia has any mention of such a rifle division:
Unsure about this as well. Lopukhovsky does mention that 5 new people's militia divisions were created in October on the basis of previously formed workers and destroyer battalions. On Oct 24, they were re-designated:
1st Moscow -> broken up after 2 weeks.
2nd Moscow -> 129 RD
3rd Moscow -> 130 RD
5th Moscow -> 158 RD
No mention on what happened to the 4th.
I don't know what info you have on the 316th, but in mid-October Russian wikipedia makes it sounds like a really bad situation for them:
I agree that the situation looked bad.
But then again, the division did became a Guards division at the end of the fight, so it must have done something right once it got settled down.
I'm unsure how it would perform before that.
Now, I don't think the outcome is in question - the Germans will defeat the force.
The question is how many days would it take to do it, and how much supply would they consume in the process (and how much supplies would they capture from the Soviets).
South of Volokolamsk was Mozhiask itself, which was heavily under pressure by the 4th Panzer Group, which apparently was actually reinforced from Volokolamsk IOTL:
...
An early breakthrough at Volokolamsk might even screw the defense of Mozhiask and the 5th Army.
Indeed. And if they breach the defense there or further south in mid-October, the situation becomes very unpredictable.
I'm not sure where the Soviet would try to reestablish the frontline in that case,