I have owned 2 of the 3.
M-70s I have owned plenty always works. Rigby single sq. Bridge, I have owned two #1, one of the original 189 .416 R & one of the reproductions, my repop would not reliably feed, poorly designed feed ramp on mine nothing like the original! The repop has a much better designed stock than the original.
I've heard the feeding issues have been resolved...do you know anything about whether that's true or not?