UPDATE:
I found a very good youtube video that showed the problem and how to correct it.
It seems that machining marks left in the breech is a common culprit for jams in these 870s (seems like simple quality control failure at Remington to me, but......)
Anyway, I machined all of ours dwon and polished them. Much much smoother.
Going goose hunting in the AM. I'm thinknking my son's 870 won't jam anymore (pleeeeeeeeeze).
To the OP, I like that Nova......