I fired a cylinder load of .44 Russian reloads. 18gr of Goex 2F and a card. RCBS .44 200 FP unsized at .430.
The .430 bullet is a loose fit in the cylinder throats, and I believe my bore is about the same as you measured.
One round still had some flair as I couldn't crimp it with my.44Spl/RM dies. The result is that it didn't chamber until I ran it a nudge into the sizing die. I'm sure a .435 bullet would prevent chambering. I haven't seen any reference to any sort of heeled bullet. I do agree that softer, unsized, bullets are the way to go.
My one offhand group at 10 yards showed promise, (3 of the 4 in 1.5", the fourth an inch farther out) just a bit high & left. I've just dug out more .44 Russ cases, and will put 'er through her paces next time.