J
It is "POSSIBLE".
I have done it on a (very well worn) R-10.
(True, from the son) story first, as we have all too little history to go with our Rosses.
"Grandpa Schiissler" (who later founded "Ad Hominem" beside Ellwood Epps (he was an ex-partner) in Orillia Ontario...see adds at top of home page) then a trapper in the "dirty thirties", was dragging trapped beavers back to his camp one winter's night and was attacked by wolves.
He shot one with the Ross (one up the spout) and his dog valiantly took on the pack while he cranked in another round. But he was "out of ammo" as it only went "click"!!
He killed one more wolf with some difficulty using the rifle (by the barrel) as a club, and the dog (somewhat chewed at this point) ran off the remaining two wolves.
The rifle sat in two pieces for 70 years, in the basement of "A/H" above, until I rescued it, and took it home.
After a somewhat creditable stock repair job, I cranked a dummy round through it and (wait for it) it would not feed!
The innards were jammed, and that was the problem all those years ago, not ammo.
I pried off the side springs (bottom out first) and drilled out the rivets (front comes out) to discover that the arms had become jammed and one was in fact disconnected.
NOW I had to re-rivet it all back together and I DO NOT RECOMMEND this endeavour to anyone other than hairpins like me.
So if you can clean/lubricate/ease up the whole works I recommend; stop right there.
Best in your restoration endeavours.
OGC