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That is some ugly jamming! As to how or why I can't exactly say from the pics.
Which stock are you using? Do the mags seat snug/properly with it? Are the mags ok? (damaged feed lips, limp springs)? Is the interior of the receiver ok? (there should be no extraneous debris other than the usual fouling, large lead chunks, pieces of brass would be very concerning).
I'd try restocking it and inspecting the mags first. The mags should seat with a minor bit of wiggle for the BC 25 rounders, 10 rounders should seat fairly stable. I would also give the gun a good takedown/cleaning and inspect the extractor to make sure it rides the slot for it on the breech face with no resistance. I'd also inspect the bolt and bolt return rod/spring for damage and make sure the bolt face is aligned with the bore.
It's probably a mag issue (as it usually is with 10/22s) but the way it's jamming looks pretty harsh from here.
I got mine in 1999 it hardly jams i use the 10 rd 25 rd 35 rd and a bd 50 rd drum the ammo that i found works the best is rem thunderbolts and even the cheapo fed 555 bricks.
Someone can post a close up picture of the open chamber when the mag is fit in? (Marauder Mag and the original one). I can see a difference in the attack angle of a original Mag and the marauder one... I think the problem come from this angle.