Let us chat my friend. Did you try this on the single seven? I treid it and I think either I didn't go far enough or the spacing may be too tight. It now binds a small bit while turning the cylinder to load and still no free spin. It didn't want to index after wards either but that has cleared up.
As far as the loading thing, op that spot right were the rims are catching, I took a small drum in my dremel. Sanded that spot down. Hit the whole loading notch. Used a cratex rubber wheel. Then used a felt bob and polish. You wouldn't be able the tell it was even done. You can see there is a small radius or bulge right at that spot that the rims rub on.
You fellows with the other rugers, the single seven that I have required you to quike jamb a cartridge in the hole before the pawl catches because there wasn't enough slack to roll it back against the pawl then load.