I found a top view of a Russian here:    (You need to Login; I can see a modified parashooter design charger fitting right in there!  I don't know about the 30-40 feed lips, they'd about have to be similar to the Russians.  Here's a vid of Hickok loading 30-06, note he pushes the top round down with the head of the next round, then slides them back under the lips.  He may not be doing it right, those lips ought to expand a bit and one should be able to simply push a round down through them.    (You need to Login; If the 30-40 is like that, it's a major problem to overcome, but if they're like the Russian, you guys ought to be able to figure a way.  Here's an old illustration of the 95, it shows the rims stacked on top of each other, got to be a slot for those rims if that's the case or shorter rounds would be moving around, locking the rims.

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